1. 如何消除textbox中按下回车时的beep声？ Private Sub Text1_KeyPress(KeyAscii As Integer) If KeyAscii = 13 Then KeyAscii = 0 End If End Sub
2.Textbox获得焦点时自动选中。 Private Sub Text1_GotFocus() Text1.SelStart = 0
Text1.SelLength = Len(Text1.Text) End Sub
3.屏蔽textbox控件自身的右键菜单，并显示自己的菜单。 方法一：
Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y _ As Single)
If Button = 2 Then
Text1.Enabled = False Text1.Enabled = True PopupMenu mymenu End If End Sub
方法二：回调函数 module： Option Explicit
Public OldWindowProc As Long ' 保存默认的窗口函数的地址
Public Const WM_CONTEXTMENU = &H7B ' 当右击文本框时，产生这条消息
Public Declare Function GetWindowLong Lib \"user32\" Alias \"GetWindowLongA\" (ByVal hWnd _ As Long, ByVal nIndex As Long) As Long
Public Declare Function SetWindowLong Lib \"user32\" Alias \"SetWindowLongA\" (ByVal hWnd _ As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function CallWindowProc Lib \"user32\" Alias \"CallWindowProcA\" (ByVal _ lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Public Function SubClass_WndMessage(ByVal hWnd As Long, ByVal Msg As Long, ByVal wp _ As Long, ByVal lp As Long) As Long
' 如果消息不是WM_CONTEXTMENU，就调用默认的窗口函数处理 If Msg <> WM_CONTEXTMENU Then
SubClass_WndMessage = CallWindowProc(OldWindowProc, hWnd, Msg, wp, lp) Exit Function End If
SubClass_WndMessage = True End Function 窗体中：
Private Const GWL_WNDPROC = (-4)
Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y _ As Single)
If Button = 1 Then Exit Sub
OldWindowProc = GetWindowLong(Text1.hWnd, GWL_WNDPROC) ' 取得窗口函数的地址 ' 用SubClass_WndMessage代替窗口函数处理消息
Call SetWindowLong(Text1.hWnd, GWL_WNDPROC, AddressOf SubClass_WndMessage) End Sub
Private Sub Text1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = 1 Then Exit Sub
' 恢复窗口的默认函数
Call SetWindowLong(Text1.hWnd, GWL_WNDPROC, OldWindowProc) PopupMenu mymenu End Sub
4. 设置TEXTBOX为只读属性
Private Declare Function SendMessage Lib \"user32\" Alias \"SendMessageA\" (ByVal hwnd _ As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function GetWindowLong Lib \"user32\" Alias \"GetWindowLongA\" (ByVal hwnd _ As Long, ByVal nIndex As Long) As Long Private Const GWL_STYLE = (-16)
Private Const EM_SETREADONLY = &HCF Private Sub Command1_Click() Dim l As Long
If (GetWindowLong(Text1.hwnd, GWL_STYLE) And &H800) Then
Text1.Text = \"This is a read/write text box.\" '文本窗口是只读窗口,设置为可读写窗口 l = SendMessage(Text1.hwnd, EM_SETREADONLY, False, vbNull) Text1.BackColor = RGB(255, 255, 255) '将背景设置为白色 Command1.Caption = \"Read&Write\" Else
Text1.Text = \"This is a readonly text box.\" '文本窗口是可读写窗口,设置为只读窗口 l = SendMessage(Text1.hwnd, EM_SETREADONLY, True, vbNull) Text1.BackColor = vbInactiveBorder '将背景设置为灰色 Command1.Caption = \"&ReadOnly\" End If End Sub
5. 利用API函数MessageBox代替MSGBOX函数可以使得Timer控件正常工作
Private Declare Function MessageBox Lib \"user32\" Alias \"MessageBoxA\" (ByVal hwnd As _ Long, ByVal lpText As String, ByVal lpCaption As String, ByVal wType As Long) As Long Private Sub Command1_Click() MsgBox \"时钟变的无效了\" End Sub
Private Sub Command2_Click()
MessageBox Me.hwnd, \"时钟正常运行\End Sub
Private Sub Timer1_Timer() Static i As Integer i = i + 1
Text1.Text = i End Sub
Private Declare Function SetWindowPos Lib \"user32\" (ByVal hwnd As Long, ByVal _ hWndInsertAfter As Long, ByVal X As Long, ByVal Y As Long, ByVal Cx As Long, ByVal Cy _ As Long, ByVal wFlags As Long) As Long
Public Sub SetOnTop(ByVal IsOnTop As Integer) Dim rtn As Long
If IsOnTop = 1 Then
rtn = SetWindowPos(Form1.hwnd, -1, 0, 0, 0, 0, 3) Else
rtn = SetWindowPos(Form1.hwnd, -2, 0, 0, 0, 0, 3) End If End Sub
Private Sub Command1_Click() SetOnTop 1 '将窗口置于最上面 End Sub
Private Sub Command2_Click() SetOnTop 0 End Sub
7.只容许运行一个程序实例（利用互斥体） 选择启动对象为sub main() module:
Public Declare Function CreateMutex Lib \"kernel32\" Alias \"CreateMutexA\" _ (lpMutexAttributes As SECURITY_ATTRIBUTES, ByVal bInitialOwner As Long, ByVal lpName _ As String) As Long
Public Type SECURITY_ATTRIBUTES nLength As Long
lpSecurityDescriptor As Long bInheritHandle As Long End Type
Public Const ERROR_ALREADY_EXISTS = 183& Private Sub Main()
Dim sa As SECURITY_ATTRIBUTES sa.bInheritHandle = 1
sa.lpSecurityDescriptor = 0 sa.nLength = Len(sa)
Debug.Print CreateMutex(sa, 1, App.Title) '这一行可千万不能删除啊 Debug.Print Err.LastDllError
If (Err.LastDllError = ERROR_ALREADY_EXISTS) Then MsgBox \"More than one instance\" Else
Form1.Show End If End Sub
8.窗体标题栏闪烁 Option Explicit
Private Declare Function FlashWindow Lib \"user32\" (ByVal hwnd As Long, ByVal bInvert _ As Long) As Long
Private Sub tmrFlash_Timer() Static mFlash As Boolean
FlashWindow hwnd, Not mFlash End Sub 8. 拷屏
方法一：利用模拟键盘
Private Declare Sub keybd_event Lib \"user32\" (ByVal bVk As Byte, ByVal bScan As Byte, _ ByVal dwFlags As Long, ByVal dwExtraInfo As Long) Const theScreen = 1 Const theForm = 0
Private Sub Command1_Click()
Call keybd_event(vbKeySnapshot, theForm, 0, 0) '若theForm改成theScreen则Copy整个Screen DoEvents
Picture1.Picture = Clipboard.GetData(vbCFBitmap) End Sub
9. 为程序注册热键 方法一：修改注册表
Private Declare Function RegisterHotKey Lib \"user32\" (ByVal hWnd As Long, ByVal id _ As Long, ByVal fsModifiers As Long, ByVal vk As Long) As Long
Private Declare Function UnregisterHotKey Lib \"user32\" (ByVal hWnd As Long, ByVal id _ As Long) As Long
Private Declare Function PeekMessage Lib \"user32\" Alias \"PeekMessageA\" (lpMsg As Msg, _ ByVal hWnd As Long, ByVal wMsgFilterMin As Long, ByVal wMsgFilterMax As Long, ByVal _ wRemoveMsg As Long) As Long
Private Declare Function WaitMessage Lib \"user32\" () As Long Private Type POINTAPI x As Long y As Long End Type
Private Type Msg hWnd As Long
Message As Long wParam As Long lParam As Long time As Long pt As POINTAPI
End Type
' 声明常数
Private Const MOD_ALT = &H1
Private Const MOD_CONTROL = &H2 Private Const MOD_SHIFT = &H4 Private Const PM_REMOVE = &H1 Private Const WM_HOTKEY = &H312 Private HotKey_Fg As Boolean Private Sub Form_Load() Dim Message As Msg
'注册 Ctrl+Y 为热键
RegisterHotKey Me.hWnd, &HBFFF&, MOD_CONTROL, vbKeyY 'RegisterHotKey Me.hWnd, &HBFF2&, MOD_CONTROL, vbKeyU Me.Show Form1.Hide '等待处理消息 HotKey_Fg = False
Do While Not HotKey_Fg '等待消息 WaitMessage
'检查是否热键被按下
If PeekMessage(Message, Me.hWnd, WM_HOTKEY, WM_HOTKEY, PM_REMOVE) Then Form1.Show 1 End If
'转让控制权,允许操作系统处理其他事件 DoEvents Loop End Sub
Private Sub Form_Unload(Cancel As Integer) HotKey_Fg = True
'撤销热键的注册
Call UnregisterHotKey(Me.hWnd, &HBFFF&) End Sub
方法二：SendMessage
Private Declare Function SendMessage Lib \"user32\" Alias \"SendMessageA\" (ByVal hwnd As _ Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Private Const WM_SETHOTKEY = &H32 Private Const HOTKEYF_SHIFT = &H1 Private Const HOTKEYF_ALT = &H4 Private Sub Form_Load() Dim l As Long
Dim wHotkey As Long
wHotkey = (HOTKEYF_ALT) * (2 ^ 8) + 65 '定义ALT+A为热键 l = SendMessage(Me.hwnd, WM_SETHOTKEY, wHotkey, 0)
End Sub
10.在状态栏显示无边框窗体图标。
Private Declare Function SetWindowLong Lib \"user32\" Alias \"SetWindowLongA\" (ByVal hWnd _ As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function GetWindowLong Lib \"user32\" Alias \"GetWindowLongA\" (ByVal hWnd _ As Long, ByVal nIndex As Long) As Long Const GWL_STYLE = (-16&)
Const WS_SYSMENU = &H80000 Private Sub Form_Load()
'Make Form's Icon visible in the taskbar
SetWindowLong Me.hWnd, GWL_STYLE, GetWindowLong(Me.hWnd, GWL_STYLE) Or WS_SYSMENU End Sub
11. 记录窗体的大小及位置和程序中的一些设置 Private Sub Form_Load()
Me.Width = GetSetting(App.Title, Me.Name, \"Width\ Me.Height = GetSetting(App.Title, Me.Name, \"Height\ Me.Top = GetSetting(App.Title, Me.Name, \"Top\ Me.Left = GetSetting(App.Title, Me.Name, \"Left\
Check1.Value = GetSetting(App.Title, Me.Name, \"check1\End Sub
Private Sub Form_Unload(Cancel As Integer)
Call SaveSetting(App.Title, Me.Name, \"Width\ Call SaveSetting(App.Title, Me.Name, \"Height\ Call SaveSetting(App.Title, Me.Name, \"Top\ Call SaveSetting(App.Title, Me.Name, \"Left\
Call SaveSetting(App.Title, Me.Name, \"check1\End Sub
12. 解决mschart控件数据更改时的闪动现象
1、在有MSChart控件的窗体中另外加入一个PictureBox控件，如MSChart1和Picture1。 2、使Picture1和MSChart1大小一致，位置相同（通过左对齐和顶端对齐）。
3、使Picture1在MSChart1前端，设置Picture1的Visible为False，即不可见。只有刷新数据时Picture1才显示。 '刷新数据过程
Private Sub Refresh()
Dim V_newchar() 'n维数组 „„
Picture1.Visible = True
MSChart1.ChartData = V_newchar '给MSChart1重新赋值,即刷新数据 MSChart1.EditCopy '将当前图表的图片复制到剪贴板中
Picture1.Picture = Clipboard.GetData() '给Picture1赋值剪贴板中的图片 End Sub
这样每一次刷新数据时Picture1显示的图片都不会产生闪烁现象 13. 无边框窗体的右键菜单
设计无边框窗体时，如果使用菜单编辑器，就会自动改变成有边框的窗体，此时，可以在另外一个窗体中（一般情况下你的程序应该不止一个窗体的吧，如果真的只有一个，可以利用其他人写的类，添加右键）编辑菜单（VISIBLE属性设为FALSE），然后在本窗体中调用。调用形式如下：
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = 2 Then
PopupMenu Form2.mymenu End If End Sub
14.创建圆角无边框窗体
Private Declare Function CreateRoundRectRgn Lib \"gdi32\" (ByVal X1 As Integer, ByVal Y1 _ As Integer, ByVal X2 As Integer, ByVal Y2 As Integer, ByVal x3 As Integer, ByVal y3 As _ Integer) As Long
Private Declare Function DeleteObject Lib \"gdi32\" (ByVal hObject As Long) As Long
Private Declare Function SetWindowRgn Lib \"user32\" (ByVal hwnd As Long, ByVal hrgn As _ Long, ByVal bRedraw As Boolean) As Long Private Sub Form_Load()
hround = CreateRoundRectRgn(0, 0, ScaleX(Form1.ScaleWidth, vbTwips, vbPixels), _ ScaleY(Form1.ScaleHeight, vbTwips, vbPixels), 20, 20) SetWindowRgn Me.hwnd, hround, True DeleteObject hround End Sub
15.拖动没有标题栏的窗体 方法一：
Private Declare Function ReleaseCapture Lib \"user32\" () As Long
Private Declare Function SendMessage Lib \"user32\" Alias \"SendMessageA\" (ByVal hwnd As _ Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Private Const HTCAPTION = 2
Private Const WM_NCLBUTTONDOWN = &HA1
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) Dim ncl As Long Dim rel As Long If Button = 1 Then i = ReleaseCapture()
ncl = SendMessage(hwnd, WM_NCLBUTTONDOWN, HTCAPTION, 0) End If End Sub
方法二：回调函数 module:
Public Const GWL_WNDPROC = (-4) Public Const WM_NCHITTEST = &H84 Public Const HTCLIENT = 1 Public Const HTCAPTION = 2
Declare Function CallWindowProc Lib \"user32\" Alias \"CallWindowProcA\" (ByVal _ lpPrevWndFunc
As Long, ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, _ ByVal lParam As Long) As Long
Declare Function GetWindowLong Lib \"user32\" Alias \"GetWindowLongA\" (ByVal hWnd As _ Long, ByVal nIndex As Long) As Long
Declare Function SetWindowLong Lib \"user32\" Alias \"SetWindowLongA\" (ByVal hWnd As _ Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Public prevWndProc As Long
Function WndProc(ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal _Param As Long) As Long
WndProc = CallWindowProc(prevWndProc, hWnd, Msg, wParam, lParam) If Msg = WM_NCHITTEST And WndProc = HTCLIENT Then WndProc = HTCAPTION End If End Function
窗体中:
Private Sub Form_Load()
prevWndProc = GetWindowLong(Me.hWnd, GWL_WNDPROC)
SetWindowLong Me.hWnd, GWL_WNDPROC, AddressOf WndProc End Sub
Private Sub Form_Unload(Cancel As Integer)
SetWindowLong Me.hWnd, GWL_WNDPROC, prevWndProc End Sub
16. 半透明窗体
Private Declare Function SetLayeredWindowAttributes Lib \"user32\" (ByVal hwnd As Long, _ ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long Private Const WS_EX_LAYERED = &H80000 Private Const LWA_ALPHA = &H2 Private Const GWL_EXSTYLE = (-20)
Private Declare Function GetWindowLong Lib \"user32\" Alias \"GetWindowLongA\" (ByVal _ hwnd As Long, ByVal nIndex As Long) As Long
Private Declare Function SetWindowLong Lib \"user32\" Alias \"SetWindowLongA\" (ByVal _ hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Private Sub Form_Load() Dim rtn As Long
rtn = GetWindowLong(Me.hwnd, GWL_EXSTYLE) '取的窗口原先的样式 rtn = rtn Or WS_EX_LAYERED ' 使窗体添加上新的样式WS_EX_LAYERED SetWindowLong Me.hwnd, GWL_EXSTYLE, rtn ' 把新的样式赋给窗体 SetLayeredWindowAttributes Me.hwnd, 0, 200, LWA_ALPHA End Sub
17.开机启动（函数及常数声明略） Private Sub Form_Load()
Dim hKey As Long, SubKey As String, Exe As String
SubKey = \"Software\\Microsoft\\Windows\\CurrentVersion\\Run\" Exe = \"可执行文件的路径\"
RegCreateKey HKEY_CURRENT_USER, SubKey, hKey
RegSetvalueEx hKey, \"autorun\ RegCloseKey hKey End Sub
18.关闭显示器
Private Declare Function SendMessage Lib \"user32\" Alias \"SendMessageA\" (ByVal hwnd _ As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Const WM_SYSCOMMAND = &H112& Const SC_MONITORPOWER = &HF170& Private Sub Command1_Click()
SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MONITORPOWER, ByVal 2& '关闭显示器 End Sub
Private Sub Command2_Click()
SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MONITORPOWER, ByVal -1& '打开显示器 End Sub
19. 在程序结束时自动关闭由SHELL打开的程序。
Private Const PROCESS_QUERY_INFORMATION = &H400 '关闭由SHELL函数打开的文件 Private Const PROCESS_TERMINATE = &H1
Private Declare Function OpenProcess Lib \"kernel32\" (ByVal dwDesiredAccess As Long, _ ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Private Declare Function TerminateProcess Lib \"kernel32\" (ByVal hProcess As Long, _ ByVal uExitCode As Long) As Long Dim ProcessId As Long
Private Sub Command1_Click()
ProcessId = Shell(\"notepad.exe.\End Sub
Private Sub Form_Unload(Cancel As Integer) Dim hProcess As Long
hProcess = OpenProcess(PROCESS_TERMINATE Or PROCESS_QUERY_INFORMATION, False, _ ProcessId)
Call TerminateProcess(hProcess, 3838) End Sub
20. 关闭、重启计算机
Public Declare Function ExitWindowsEx Lib \"user32\" Alias \"ExitWindowsEx\" (ByVal _ uFlags As Long, ByVal dwReserved As Long) As Long
ExitWindowsEx 1，0 关机 ExitWindowsEx 0，1 重新启动 21.显示关机提示框
Private Declare Function SHRestartSystemMB Lib \"shell32\" Alias \"#59\" (ByVal hOwner _ As Long, ByVal sExtraPrompt As String, ByVal uFlags As Long) As Long Const EWX_LOGOFF = 0 Const EWX_SHUTDOWN = 1 Const EWX_REBOOT = 2
Const EWX_FORCE = 4 Const EWX_POWEROFF = 8 Private Sub Command1_Click()
SHRestartSystemMB Me.hWnd, PROMPT, EWX_LOGOFF End Sub
22.右键托盘图标后必须电击他才可以消失，怎么办？ Case WM_RBUTTONUP '鼠标在图标上右击时弹出菜单 SetForegroundWindow Me.hwnd Me.PopupMenu mnuTray
加一句 SetForegroundWindow Me.hwnd 23. 将progressbar嵌入statusbar中
Private Declare Function SetParent Lib \"user32\" (ByVal hWndChild As Long, ByVal _ hWndNewParent As Long) As Long Private Sub Command1_Click() With ProgressBar1 .Max = 1000 Dim i As Integer For i = 1 To 1000 .Value = i Next i End With End Sub
Private Sub Form_Load()
ProgressBar1.Appearance = ccFlat
SetParent ProgressBar1.hWnd, StatusBar1.hWnd ProgressBar1.Left = StatusBar1.Panels(1).Left ProgressBar1.Top = 100
ProgressBar1.Width = StatusBar1.Panels(1).Width - 50 ProgressBar1.Height = StatusBar1.Height - 150 End Sub '相对位置你可以自己再调一下 24.使你的程序界面具有XP风格
产生一个和你的可执行程序同名的后缀为exe.manifest的文件，并和可执行文件放在同一路径中。
代码中加入:
Private Declare Sub InitCommonControls Lib \"comctl32.dll\" () Private Sub Form_Initialize() InitCommonControls End Sub 注意：
1 工具栏控件一定要用Microsoft Windows Common Controls 5.0，而不要用Microsoft Windows Common Controls 6.0。因为此
InitCommonControls API函数是位于comctl32.dll（Microsoft Windows Common Controls 5.0控件的动态链接库中）。
2 放在FRAME控件中的单远按钮有些“麻烦”！为了解决此问题，可以将单选按钮放在
PICTURE控件中（以PICTURE控件作为容器），再将 PICTURE控件放在FRAME控件中，就可以了。 3 必须编译之后才能看到效果
exe.manifest文件中的内容，可用notepad编辑。
name=\"CompanyName.ProductName.YourApp\" type=\"win32\" /> processorArchitecture=\"X86\" publicKeyToken=\"6595b144ccf1df\" language=\"*\" />
25.如何打印PictureBox中的所有控件 添加另外一个PictureBox，然后： Private Const WM_PAINT = &HF Private Const WM_PRINT = &H317 Private Const PRF_CLIENT = &H4& Private Const PRF_CHILDREN = &H10& Private Const PRF_OWNED = &H20&
Private Const PHYSICALOFFSETX As Long = 112 Private Const PHYSICALOFFSETY As Long = 113
Private Declare Function SendMessage Lib \"user32\" Alias \"SendMessageA\" (ByVal hwnd _ As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long Private Declare Function GetDeviceCaps Lib \"gdi32\" (ByVal hdc As Long, ByVal nindex _ As Long) As Long
private Sub Form_Load()
Picture1.AutoRedraw = True Picture2.AutoRedraw = True Picture2.BorderStyle = 0 Picture2.Visible = False
End Sub
Private Sub Command2_Click()
Dim retval As Long, xmargin As Single, ymargin As Single Dim x As Single, y As Single x = 1: y = 1 With Printer
.ScaleMode = vbInches
xmargin = GetDeviceCaps(.hdc, PHYSICALOFFSETX) xmargin = (xmargin * .TwipsPerPixelX) / 1440
ymargin = GetDeviceCaps(.hdc, PHYSICALOFFSETY) ymargin = (ymargin * .TwipsPerPixelY) / 1440 Picture2.Width = Picture1.Width Picture2.Height = Picture1.Height DoEvents
Picture1.SetFocus
retval = SendMessage(Picture1.hwnd, WM_PAINT, Picture2.hdc, 0) retval = SendMessage(Picture1.hwnd, WM_PRINT, Picture2.hdc, _ PRF_CHILDREN + PRF_CLIENT + PRF_OWNED) DoEvents
Printer.Print \"\"
.PaintPicture Picture2.Image, x - xmargin, y - ymargin .EndDoc End With End Sub
26.冒泡排序如下：
Sub BubbleSort(List() As Double) Dim First As Double, Last As Double Dim i As Integer, j As Integer Dim Temp As Double First = LBound(List) Last = UBound(List) For i = First To Last - 1 For j = i + 1 To Last If List(i) > List(j) Then Temp = List(j) List(j) = List(i) List(i) = Temp End If Next j Next i End Sub
27.清空回收站
Private Declare Function SHEmptyRecycleBin Lib \"shell32.dll\" Alias _
\"SHEmptyRecycleBinA\" (ByVal hwnd As Long, ByVal pszRootPath As String, _ ByVal dwFlags As Long) As Long
Private Declare Function SHUpdateRecycleBinIcon Lib \"shell32.dll\" () As Long Private Const SHERB_NOCONFIRMATION = &H1 Private Const SHERB_NOPROGRESSUI = &H2 Private Const SHERB_NOSOUND = &H4 Private Sub Command1_Click() Dim retval As Long ' return value
retval = SHEmptyRecycleBin(RecycleBin.hwnd, \"\SHERB_NOPROGRESSUI) ' 清空回收站, 确认
' 若有错误出现，则返回回收站图示 If retval <> 0 Then ' error retval = SHUpdateRecycleBinIcon() End If End Sub
Private Sub Command2_Click()
Dim retval As Long ' return value
' 清空回收站, 不确认
retval = SHEmptyRecycleBin(RecycleBin.hwnd, \"\ ' 若有错误出现，则返回回收站图示 If retval <> 0 Then ' error retval = SHUpdateRecycleBinIcon() End If
Command1_Click End Sub
28.获得系统文件夹的路径
Private Declare Function GetSystemDirectory Lib \"kernel32\" Alias _
\"GetSystemDirectoryA\" (ByVal lpBuffer As String, ByVal nSize As Long) As Long Private Sub Command1_Click() Dim syspath As String Dim len5 As Long syspath = String(255, 0)
len5 = GetSystemDirectory(syspath, 256)
syspath = Left(syspath, InStr(1, syspath, Chr(0)) - 1) Debug.Print \"System Path : \"; syspath End Sub
29.动态增加控件并响应事件 Option Explicit
'通过使用WithEvents关键字声明一个对象变量为新的命令按钮 Private WithEvents NewButton As CommandButton '增加控件
Private Sub Command1_Click()
If NewButton Is Nothing Then
'增加新的按钮cmdNew
Set NewButton = Controls.Add(\"VB.CommandButton\ '确定新增按钮cmdNew的位置
NewButton.Move Command1.Left + Command1.Width + 240, Command1.Top NewButton.Caption = \"新增的按钮\" NewButton.Visible = True End If End Sub
'删除控件(注：只能删除动态增加的控件) Private Sub Command2_Click() If NewButton Is Nothing Then Else
Controls.Remove NewButton Set NewButton = Nothing End If End Sub
'新增控件的单击事件
Private Sub NewButton_Click()
MsgBox \"您选中的是动态增加的按钮！\" End Sub
30.得到磁盘序列号
Function GetSerialNumber(strDrive As String) As Long Dim SerialNum As Long Dim Res As Long Dim Temp1 As String Dim Temp2 As String
Temp1 = String$(255, Chr$(0)) Temp2 = String$(255, Chr$(0))
Res = GetVolumeInformation(strDrive, Temp1, Len(Temp1), SerialNum, 0, 0, Temp2, _ Len(Temp2))
GetSerialNumber = SerialNum End Function
调用形式 Label1.Caption = GetSerialNumber(\"c:\\\") 31.打开屏幕保护
Private Declare Function SendMessage Lib \"user32\" Alias \"SendMessageA\" (ByVal hwnd _ As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
'我们将要调用的那个消息，在MSDN中搜索WM_SYSCOMMAND就可以找到具体说明 Const WM_SYSCOMMAND = &H112
'这个参数指明了我们让系统启动屏幕保护 Const SC_SCREENSAVE = &HF140& Private Sub Command1_Click()
SendMessage Me.hwnd, WM_SYSCOMMAND, SC_SCREENSAVE, 0 End Sub
32.获得本机IP地址
方法一：利用Winsock控件 winsockip.localip 方法二：
Private Const MAX_IP = 255 Private Type IPINFO dwAddr As Long dwIndex As Long dwMask As Long
dwBCastAddr As Long dwReasmSize As Long unused1 As Integer unused2 As Integer End Type
Private Type MIB_IPADDRTABLE dEntrys As Long
mIPInfo(MAX_IP) As IPINFO End Type
Private Type IP_Array mBuffer As MIB_IPADDRTABLE BufferLen As Long End Type
Private Declare Sub CopyMemory Lib \"kernel32\" Alias \"RtlMoveMemory\" (Destination _ As Any, Source As Any, ByVal Length As Long)
Private Declare Function GetIpAddrTable Lib \"IPHlpApi\" (pIPAdrTable As Byte, _ pdwSize As Long, ByVal Sort As Long) As Long Dim strIP As String
Private Function ConvertAddressToString(longAddr As Long) As String Dim myByte(3) As Byte Dim Cnt As Long
CopyMemory myByte(0), longAddr, 4 For Cnt = 0 To 3
ConvertAddressToString = ConvertAddressToString + CStr(myByte(Cnt)) + \".\" Next Cnt
ConvertAddressToString = Left$(ConvertAddressToString, Len(ConvertAddressToString) - 1) End Function
Public Sub Start()
Dim Ret As Long, Tel As Long Dim bBytes() As Byte
Dim Listing As MIB_IPADDRTABLE On Error GoTo END1
GetIpAddrTable ByVal 0&, Ret, True If Ret <= 0 Then Exit Sub
ReDim bBytes(0 To Ret - 1) As Byte GetIpAddrTable bBytes(0), Ret, False
CopyMemory Listing.dEntrys, bBytes(0), 4
strIP = \"你机子上有 \" & Listing.dEntrys & \" 个 IP 地址。\" & vbCrLf strIP = strIP & \"------------------------------------------------\" & vbCrLf & vbCrLf For Tel = 0 To Listing.dEntrys - 1
CopyMemory Listing.mIPInfo(Tel), bBytes(4 + (Tel * Len(Listing.mIPInfo(0)))), Len _(Listing.mIPInfo(Tel))
strIP = strIP & \"IP 地址 : \" & ConvertAddressToString(Listing.mIPInfo(Tel).dwAddr) & vbCrLf Next Exit Sub END1:
MsgBox \"ERROR\" End Sub
Private Sub Form_Load() Start
MsgBox strIP End Sub
33. 用键盘方向键控制COMBOX
Private Declare Function SendMessage Lib \"user32\" Alias \"SendMessageA\" _ (ByVal hwnd As Long, _ ByVal wMsg As Long, _ ByVal wParam As Long, _ lParam As Any) As Long
Const CB_SHOWDROPDOWN = &H14F Dim bDrop As Boolean Private isDo As Boolean Private Sub Combo1_Click() If Not isDo Then
isDo = True '<----------回置状态 Exit Sub Else: MsgBox \"safd\" End If End Sub
Private Sub Combo1_DropDown() bDrop = True End Sub
Private Sub Combo1_KeyDown(KeyCode As Integer, Shift As Integer) If KeyCode = 40 Then
isDo = False
SendMessage Combo1.hwnd, CB_SHOWDROPDOWN, 1, 0 ElseIf KeyCode = 38 Then isDo = False
If Combo1.ListIndex = 0 Then If bDrop Then bDrop = False
SendMessage Combo1.hwnd, CB_SHOWDROPDOWN, 0, 0 End If End If End If End Sub
Private Sub Combo1_KeyUp(KeyCode As Integer, Shift As Integer) If Combo1.Text = Combo1.List(0) Then isDo = True End If End Sub
Private Sub Form_Load() isDo = True
Combo1.AddItem \"abcd\" Combo1.AddItem \"abcd1\" Combo1.AddItem \"abcd2\" Combo1.AddItem \"abcd3\" End Sub
35.VB下的CRC校验程序 一计算法
计算法就是依据CRC校验码的产生原理来设计程序。其优点是模块代码少，修改灵活，可移植性好。其缺点为计算量大。为了便于理解，这里假 定了三位数据，而多项式码为A001(hex)。
在窗体上放置一命令按钮Command1，并添加如下代码： Private Sub Command1_Click() Dim CRC() As Byte
Dim d() As Byte '待传输数据 ReDim d(2) As Byte d(0) = 123 d(1) = 112 d(2) = 135
CRC = CRC16(d) '调用CRC16计算函数 'CRC(0)为高位 'CRC(1)为低位 End Sub
注意：在数据传输时CRC的低位可能在前，而高位在后。 Function CRC16(data() As Byte) As String
Dim CRC16Lo As Byte, CRC16Hi As Byte 'CRC寄存器
Dim CL As Byte, CH As Byte '多项式码&HA001 Dim SaveHi As Byte, SaveLo As Byte Dim i As Integer Dim Flag As Integer CRC16Lo = &HFF CRC16Hi = &HFF CL = &H1 CH = &HA0
For i = 0 To UBound(data)
CRC16Lo = CRC16Lo Xor data(i) '每一个数据与CRC寄存器进行异或 For Flag = 0 To 7 SaveHi = CRC16Hi SaveLo = CRC16Lo
CRC16Hi = CRC16Hi \\ 2 '高位右移一位 CRC16Lo = CRC16Lo \\ 2 '低位右移一位
If ((SaveHi And &H1) = &H1) Then '如果高位字节最后一位为1 CRC16Lo = CRC16Lo Or &H80 '则低位字节右移后前面补1 End If '否则自动补0
If ((SaveLo And &H1) = &H1) Then '如果LSB为1，则与多项式码进行异或 CRC16Hi = CRC16Hi Xor CH CRC16Lo = CRC16Lo Xor CL End If Next Flag Next i
Dim ReturnData(1) As Byte
ReturnData(0) = CRC16Hi 'CRC高位 ReturnData(1) = CRC16Lo 'CRC低位 CRC16 = ReturnData End Function 2．查表法
查表法的优缺点与计算法的正好相反。为了便于比较，这里所有的假定与计算法的完全相同，都而在窗体上放置一个Command1的按钮，其
代码部分与上面的也完全一致。下面只介绍CRC函数的编写源代码。 Private Function CRC16(data() As Byte) As String Dim CRC16Hi As Byte Dim CRC16Lo As Byte CRC16Hi = &HFF CRC16Lo = &HFF Dim i As Integer Dim iIndex As Long
For i = 0 To UBound(data)
iIndex = CRC16Lo Xor data(i)
CRC16Lo = CRC16Hi Xor GetCRCLo(iIndex) '低位处理 CRC16Hi = GetCRCHi(iIndex) '高位处理
Next i
Dim ReturnData(1) As Byte
ReturnData(0) = CRC16Hi 'CRC高位 ReturnData(1) = CRC16Lo 'CRC低位 CRC16 = ReturnData End Function
'CRC低位字节值表
Function GetCRCLo(Ind As Long) As Byte
GetCRCLo = Choose(Ind + 1, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40,
&H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1,
&H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80,
&H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0,
&HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0,
&H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81,
&H40, &H1, &HC0, &H80, &H41, &H1, &HC0, _
&H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80,
&H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0,
&HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1,
&H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81,
&H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1,
&HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40) End Function
'CRC高位字节值表
Function GetCRCHi(Ind As Long) As Byte
GetCRCHi = Choose(Ind + 1, &H0, &HC0, &HC1, &H1, &HC3, &H3, &H2, &HC2, &HC6, &H6, &H7, &HC7, &H5, &HC5, &HC4, &H4,
&HCC, &HC, &HD, &HCD, &HF, &HCF, &HCE, &HE, &HA, &HCA, &HCB, &HB, &HC9, &H9, &H8, &HC8, &HD8, &H18, &H19, &HD9, &H1B, &HDB,
&HDA, &H1A, &H1E, &HDE, &HDF, &H1F, &HDD, &H1D, &H1C, &HDC, &H14, &HD4, &HD5, &H15, &HD7, &H17, &H16, &HD6, &HD2, &H12, &H13,
&HD3, &H11, &HD1, &HD0, &H10, &HF0, &H30, &H31, &HF1, &H33, &HF3, &HF2, &H32, &H36, &HF6, &HF7, &H37, &HF5, &H35, &H34, &HF4,
&H3C, &HFC, &HFD, &H3D, &HFF, &H3F, &H3E, &HFE, &HFA, &H3A, &H3B, &HFB, &H39, &HF9, &HF8, &H38, &H28, &HE8, &HE9, &H29, &HEB,
&H2B, &H2A, &HEA, &HEE, &H2E, &H2F, &HEF, &H2D, &HED, &HEC, &H2C, &HE4, &H24, &H25, &HE5, &H27, &HE7, &HE6, &H26, &H22, &HE2,
&HE3, &H23, &HE1, &H21, &H20, &HE0, &HA0, &H60, _
&H61, &HA1, &H63, &HA3, &HA2, &H62, &H66, &HA6, &HA7, &H67, &HA5, &H65, &H, &HA4, &H6C, &HAC, &HAD, &H6D, &HAF, &H6F, &H6E,
&HAE, &HAA, &H6A, &H6B, &HAB, &H69, &HA9, &HA8, &H68, &H78, &HB8, &HB9, &H79, &HBB, &H7B, &H7A, &HBA, &HBE, &H7E, &H7F, &HBF,
&H7D, &HBD, &HBC, &H7C, &HB4, &H74, &H75, &HB5, &H77, &HB7, &HB6, &H76, &H72, &HB2, &HB3, &H73, &HB1, &H71, &H70, &HB0, &H50,
&H90, &H91, &H51, &H93, &H53, &H52, &H92, &H96, &H56, &H57, &H97, &H55, &H95, &H94, &H54, &H9C, &H5C, &H5D, &H9D, &H5F, &H9F,
&H9E, &H5E, &H5A, &H9A, &H9B, &H5B, &H99, &H59, &H58, &H98, &H88, &H48, &H49, &H, &H4B, &H8B, &H8A, &H4A, &H4E, &H8E, &H8F,
&H4F, &H8D, &H4D, &H4C, &H8C, &H44, &H84, &H85, &H45, &H87, &H47, &H46, &H86, &H82, &H42, &H43, &H83, &H41, &H81, &H80, &H40) End Function
36.如何打开光驱
Public Declare Function CDdoor Lib \"winmm.dll\" Alias \"mciSendStringA\" (ByVal lpstrCommand As String, ByVal lpstrReturnString
As String, ByVal uReturnLength As Long, ByVal hwndCallback As Long) As Long Call CDdoor(\"set CDAudio door open\打开光驱 Call CDdoor(\"set CDAudio door closed\关闭光驱 36.检测是否以联网及联网方式 module:
Public Declare Function InternetGetConnectedStateEx Lib \"wininet.dll\" _ Alias \"InternetGetConnectedStateExA\" _ (ByRef lpdwFlags As Long, _
ByVal lpszConnectionName As String, _ ByVal dwNameLen As Long, _ ByVal dwReserved As Long _ ) As Long
Public Enum EIGCInternetConnectionState INTERNET_CONNECTION_MODEM = &H1& INTERNET_CONNECTION_LAN = &H2& INTERNET_CONNECTION_PROXY = &H4& INTERNET_RAS_INSTALLED = &H10&
INTERNET_CONNECTION_OFFLINE = &H20&
INTERNET_CONNECTION_CONFIGURED = &H40& End Enum
Public Property Get InternetConnected( _
Optional ByRef eConnectionInfo As EIGCInternetConnectionState, _
Optional ByRef sConnectionName As String _ ) As Boolean
Dim dwFlags As Long Dim sNameBuf As String Dim lR As Long Dim iPos As Long
sNameBuf = String$(513, 0)
lR = InternetGetConnectedStateEx(dwFlags, sNameBuf, 512, 0&) eConnectionInfo = dwFlags
iPos = InStr(sNameBuf, vbNullChar) If iPos > 0 Then
sConnectionName = Left$(sNameBuf, iPos - 1) ElseIf Not sNameBuf = String$(513, 0) Then sConnectionName = sNameBuf End If
InternetConnected = (lR = 1) End Property 窗体中
Private Sub Form_Load()
' Determine whether we have a connection: bConnected = InternetConnected(eR, sName)
' The connection state info parameter provides details ' about how we connect:
If (eR And INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM Then sMsg = sMsg & \"Connection uses a modem.\" & vbCrLf End If
If (eR And INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN Then sMsg = sMsg & \"Connection uses LAN.\" & vbCrLf End If
If (eR And INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY Then sMsg = sMsg & \"Connection is via Proxy.\" & vbCrLf End If
If (eR And INTERNET_CONNECTION_OFFLINE) = INTERNET_CONNECTION_OFFLINE Then sMsg = sMsg & \"Connection is Off-line.\" & vbCrLf End If
If (eR And INTERNET_CONNECTION_CONFIGURED) = INTERNET_CONNECTION_CONFIGURED Then
sMsg = sMsg & \"Connection is Configured.\" & vbCrLf Else
sMsg = sMsg & \"Connection is Not Configured.\" & vbCrLf End If
If (eR And INTERNET_RAS_INSTALLED) = INTERNET_RAS_INSTALLED Then sMsg = sMsg & \"System has RAS installed.\" & vbCrLf
End If
' Display the connection name and info: If bConnected Then
Text1.Text = \"Connected: \" & sName & vbCrLf & vbCrLf & sMsg Else
Text1.Text = \"Not Connected: \" & sName & vbCrLf & vbCrLf & sMsg End If End Sub
37.得到当前windows的版本号 module:
Type OSVERSIONINFO
dwOSVersionInfoSize As Long dwMajorVersion As Long dwMinorVersion As Long dwBuildNumber As Long dwPlatformId As Long
szCSDVersion As String * 128 ' Maintenance string for PSS usage End Type
Declare Function GetVersionEx Lib \"kernel32\" Alias \"GetVersionExA\" (lpVersionInformation As OSVERSIONINFO) As Long
Declare Function GetSystemMetrics Lib \"user32\" (ByVal nIndex As Long) As Long End Sub
41.如何在小画面上显示大图片 方法一：
一个picturebox控件，一个image控件（以picturebox为容器），图片加载在image中，一个HScroll1，VScroll1（以picturebox为容器）。 Private Sub Bar1_Change() Image1.Left = -bar1.Value End Sub
Private Sub Bar2_Change() Image1.Top = -Bar2.Value End Sub
Private Sub Form_Load() Image1.Left = 0 Image1.Top = 0
bar1.SmallChange = 300 Bar2.SmallChange = 300
bar1.Max = Image1.Width - Picture1.Width Bar2.Max = Image1.Height - Picture1.Height bar1.Min = 0 Bar2.Min = 0 End Sub
方法二：利用鼠标移动图片
一个picturebox控件，一个image控件（以picturebox为容器），图片加载在image中 Dim ix As Integer Dim iy As Integer
Private Sub Form_Load() Image1.Left = 0 Image1.Top = 0 End Sub
Private Sub Image1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = vbLeftButton Then ix = X iy = Y End If End Sub
Private Sub Image1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single) Dim ipx As Integer Dim ipy As Integer
If Button = vbLeftButton Then ipx = Image1.Left + X - ix ipy = Image1.Top + Y - iy If ipx > 0 Then Image1.Left = 0 Else
If ipx < Picture1.Width - Image1.Width Then ipx = Picture1.Width - Image1.Width Else
Image1.Left = ipx End If End If
If ipy > 0 Then Image1.Top = 0 Else
If ipy < Picture1.Height - Image1.Height Then ipy = Picture1.Height - Image1.Height Else
Image1.Top = ipy End If End If End If End Sub
Private Sub Image1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single) Me.MousePointer = 0 End Sub
42. 使窗体不出屏幕左边界
module:
Option Explicit
Declare Function SetWindowLong Lib \"user32\" Alias \"SetWindowLongA\" _
(ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Declare Function GetWindowLong Lib \"user32\" Alias \"GetWindowLongA\" _ (ByVal hwnd As Long, ByVal nIndex As Long) As Long
Declare Function CallWindowProc Lib \"user32\" Alias \"CallWindowProcA\" _ (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal Msg As Long, _ ByVal wParam As Long, ByVal lParam As Long) As Long
Declare Sub CopyMemory Lib \"KERNEL32\" Alias \"RtlMoveMemory\" ( _ lpvDest As Any, lpvSource As Any, ByVal cbCopy As Long) Public Const GWL_WNDPROC = (-4)
Public Const WM_WINDOWPOSCHANGING = &H46 Type WINDOWPOS hwnd As Long
hWndInsertAfter As Long x As Long y As Long cx As Long cy As Long flags As Long End Type
Public preWinProc As Long
'而重点就在於Window重新定位之前会传 '出WM_WINDOWPOSCHANGING这个讯息，而lParam指向一个WINDOWPOS的STRUCTURE。 Public Function wndproc(ByVal hwnd As Long, ByVal Msg As Long, _ ByVal wParam As Long, ByVal lParam As Long) As Long Dim lwd As Long, hwd As Long
If Msg = WM_WINDOWPOSCHANGING Then Dim WPOS As WINDOWPOS
CopyMemory WPOS, ByVal lParam, Len(WPOS) If WPOS.x < 0 Then WPOS.x = 0
CopyMemory ByVal lParam, WPOS, Len(WPOS) End If End If
'将之送往原来的Window Procedure
wndproc = CallWindowProc(preWinProc, hwnd, Msg, wParam, lParam) End Function 窗体中
Sub Form_Load() Dim ret As Long
'记录原本的Window Procedure的位址
preWinProc = GetWindowLong(Me.hwnd, GWL_WNDPROC)
ret = SetWindowLong(Me.hwnd, GWL_WNDPROC, AddressOf wndproc) End Sub
Private Sub Form_Unload(Cancel As Integer) Dim ret As Long
'取消Message的截取，而使之又只送往原来的Window Procedure ret = SetWindowLong(Me.hwnd, GWL_WNDPROC, preWinProc) End Sub
43.打开指定的窗体
Private Declare Function ShellExecute Lib \"shell32.dll\" Alias \"ShellExecuteA\" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long Const SW_SHOWNORMAL = 1
Private Sub Command1_Click() '我的文档
ShellExecute Me.hwnd, \"open\End Sub
Private Sub Command2_Click() '我的电脑
ShellExecute Me.hwnd, \"open\\"explorer\\"::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\vbnulstring, 1 End Sub
Private Sub Command3_Click() '网上邻居
ShellExecute Me.hwnd, \"open\\"explorer\\"::{208d2c60-3aea-1069-a2d7-08002b30309d}\vbNullString, 1 End Sub
Private Sub Command4_Click() '回收站
ShellExecute Me.hwnd, \"open\\"explorer\\"::{5ff040-5081-101b-9f08-00aa002f954e}\vbNullString, 1 End Sub
Private Sub Command5_Click() '控制面板
ShellExecute Me.hwnd, \"open\\"explorer\\"::{21ec2020-3aea-1069-a2dd-08002b30309d}\vbNullString, 1 End Sub
Private Sub Command6_Click() '打开指定的路径
ShellExecute Me.hwnd, \"open\练习事例\End Sub
Private Sub Command7_Click() '音量控制 Shell \"sndvol32.exe\End Sub
44.窗体分割条
splitter为一picturebox控件。 Option Explicit
Private Const SPLT_WDTH As Integer = 35 Private currSplitPosX As Long Dim CTRL_OFFSET As Integer
Dim SPLT_COLOUR As Long Private Sub Form_Load() CTRL_OFFSET = 5
SPLT_COLOUR = &H808080 currSplitPosX = &H7FFFFFFF
ListLeft.AddItem \"VB俱乐部\" ListLeft.AddItem \"VB动画篇\" ListLeft.AddItem \"VB网络篇\" ListLeft.AddItem \"VB控件类\" ListLeft.AddItem \"VB界面类\"
TextRight = \"经常见到窗体上有二个相邻的列表框，可以用鼠标任意拉动中间分割条，改变列表框大小。\" End Sub
Private Sub Form_Resize() Dim x1 As Integer Dim x2 As Integer
Dim height1 As Integer Dim width1 As Integer Dim width2 As Integer On Error Resume Next
height1 = ScaleHeight - (CTRL_OFFSET * 2) x1 = CTRL_OFFSET width1 = ListLeft.Width
x2 = x1 + ListLeft.Width + SPLT_WDTH - 1 width2 = ScaleWidth - x2 - CTRL_OFFSET
ListLeft.Move x1% - 1, CTRL_OFFSET, width1, height1 TextRight.Move x2, CTRL_OFFSET, width2 + 1, height1
Splitter.Move x1 + ListLeft.Width - 1, CTRL_OFFSET, SPLT_WDTH, height1 End Sub
Private Sub Splitter_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = vbLeftButton Then
Splitter.BackColor = SPLT_COLOUR currSplitPosX = CLng(X) Else
If currSplitPosX <>&H7FFFFFFF Then Splitter_MouseUp Button, Shift, X, Y currSplitPosX = &H7FFFFFFF End If End Sub
Private Sub Splitter_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single) If currSplitPosX&<>&H7FFFFFFF Then If CLng(X) <> currSplitPosX Then
Splitter.Move Splitter.Left + X, CTRL_OFFSET, SPLT_WDTH, ScaleHeight - (CTRL_OFFSET * 2) currSplitPosX = CLng(X) End If
End If End Sub
Private Sub Splitter_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single) If currSplitPosX <>&H7FFFFFFF Then If CLng(X) <> currSplitPosX Then
Splitter.Move Splitter.Left + X, CTRL_OFFSET, SPLT_WDTH, ScaleHeight - (CTRL_OFFSET * 2) End If
currSplitPosX = &H7FFFFFFF
Splitter.BackColor = &H8000000F
If Splitter.Left > 60 And Splitter.Left < (ScaleWidth - 60) Then ListLeft.Width = Splitter.Left - ListLeft.Left ElseIf Splitter.Left < 60 Then ListLeft.Width = 60 Else
ListLeft.Width = ScaleWidth - 60 End If
Form_Resize End If End Sub
44.托盘程序 module:
Option Explicit
Public preWinProc As Long Public NewForm As Form Public NewMenu As Menu
Public Const WM_USER = &H400
Public Const WM_LBUTTONUP = &H202 Public Const WM_MBUTTONUP = &H208 Public Const WM_RBUTTONUP = &H205
Public Const TRAY_CALLBACK = (WM_USER + 1001&) Public Const GWL_WNDPROC = (-4) Public Const GWL_USERDATA = (-21) Public Const NIF_ICON = &H2 Public Const NIF_TIP = &H4 Public Const NIM_ADD = &H0 Public Const NIF_MESSAGE = &H1 Public Const NIM_MODIFY = &H1 Public Const NIM_DELETE = &H2
Declare Function CallWindowProc Lib \"user32\" Alias \"CallWindowProcA\" (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Declare Function SetWindowLong Lib \"user32\" Alias \"SetWindowLongA\" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Declare Function Shell_NotifyIcon Lib \"shell32.dll\" Alias \"Shell_NotifyIconA\" (ByVal dwMessage As Long, lpData As NOTIFYICONDATA) As Long Public Type NOTIFYICONDATA cbSize As Long hwnd As Long uID As Long uFlags As Long
uCallbackMessage As Long hIcon As Long
szTip As String * End Type
Private NOTI As NOTIFYICONDATA
Public Function NewWindone(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long If Msg = TRAY_CALLBACK Then
If lParam = WM_LBUTTONUP Then
' 单击左键，弹出窗口
If NewForm.WindowState = vbMinimized Then _ NewForm.WindowState = NewForm.LastState NewForm.SetFocus Exit Function End If
If lParam = WM_RBUTTONUP Then
' 单击右键，弹出菜单
NewForm.PopupMenu NewMenu Exit Function End If End If
NewWindone = CallWindowProc(preWinProc, hwnd, Msg, wParam, lParam) End Function
Public Sub AddToTray(frm As Form, mnu As Menu) Set NewForm = frm Set NewMenu = mnu
preWinProc = SetWindowLong(frm.hwnd, GWL_WNDPROC, AddressOf NewWindone) With NOTI .uID = 0
.hwnd = frm.hwnd .cbSize = Len(NOTI)
.hIcon = frm.Icon.Handle .uFlags = NIF_ICON
.uCallbackMessage = TRAY_CALLBACK .uFlags = .uFlags Or NIF_MESSAGE .cbSize = Len(NOTI)
End With
Shell_NotifyIcon NIM_ADD, NOTI End Sub '屏蔽托盘
Public Sub RemoveFromTray() With NOTI .uFlags = 0 End With
Shell_NotifyIcon NIM_DELETE, NOTI
SetWindowLong NewForm.hwnd, GWL_WNDPROC, preWinProc End Sub
Public Sub SetTrayTip(tip As String) With NOTI
.szTip = tip & vbNullChar .uFlags = NIF_TIP End With
Shell_NotifyIcon NIM_MODIFY, NOTI End Sub
Public Sub SetTrayIcon(pic As Picture)
If pic.Type <> vbPicTypeIcon Then Exit Sub With NOTI
.hIcon = pic.Handle .uFlags = NIF_ICON End With
Shell_NotifyIcon NIM_MODIFY, NOTI End Sub 窗体中
Private Sub Form_Load() AddToTray Me, Tray SetTrayTip \"托盘演示\" End Sub
Private Sub Form_Unload(Cancel As Integer) RemoveFromTray End Sub
45.led数值显示 添加类模块：（name属性为mcLCD） Option Explicit
Private Type Coordinate X As Integer Y As Integer End Type
Dim BasePoint As Coordinate Dim SegWidth As Integer Dim SegHeight As Integer
Dim p As PictureBox
Property Let BackColor(Color As Long) p.BackColor = Color End Property
Private Sub DrawNumber(Number As Integer) Select Case Number Case 0
DrawSegment (1): DrawSegment (2): DrawSegment (3): DrawSegment (4) DrawSegment (5): DrawSegment (6) Case 1
DrawSegment (2): DrawSegment (3) Case 2
DrawSegment (1): DrawSegment (2): DrawSegment (7): DrawSegment (5) DrawSegment (4) Case 3
DrawSegment (1): DrawSegment (2): DrawSegment (7): DrawSegment (3) DrawSegment (4) Case 4
DrawSegment (2): DrawSegment (3): DrawSegment (7): DrawSegment (6) Case 5
DrawSegment (1): DrawSegment (6): DrawSegment (7): DrawSegment (3) DrawSegment (4) Case 6
DrawSegment (1): DrawSegment (6): DrawSegment (7): DrawSegment (3) DrawSegment (4): DrawSegment (5) Case 7
DrawSegment (1): DrawSegment (2) DrawSegment (3) Case 8
DrawSegment (1): DrawSegment (2): DrawSegment (3): DrawSegment (4) DrawSegment (5): DrawSegment (6): DrawSegment (7) Case 9
DrawSegment (1): DrawSegment (2): DrawSegment (3): DrawSegment (4) DrawSegment (6): DrawSegment (7) End Select End Sub
Private Sub DrawSegment(SegNum As Integer) ' 1 ' ___ ' | | ' 6 | | 2 ' |-7-| ' 5 | | 3 ' |___|
' ' 4
'画出七段数码管的七个组成部分 Select Case SegNum Case 1
p.Line (BasePoint.X + 1, BasePoint.Y)-(BasePoint.X + SegWidth - 1, BasePoint.Y)
p.Line (BasePoint.X + 2, BasePoint.Y + 1)-(BasePoint.X + SegWidth - 2, BasePoint.Y + 1) p.Line (BasePoint.X + 3, BasePoint.Y + 2)-(BasePoint.X + SegWidth - 3, BasePoint.Y + 2) Case 2
p.Line (BasePoint.X + SegWidth - 1, BasePoint.Y + 1)-(BasePoint.X + SegWidth - 1, BasePoint.Y + (SegHeight \\ 2) - 1)
p.Line (BasePoint.X + SegWidth - 2, BasePoint.Y + 2)-(BasePoint.X + SegWidth - 2, BasePoint.Y + (SegHeight \\ 2))
p.Line (BasePoint.X + SegWidth - 3, BasePoint.Y + 3)-(BasePoint.X + SegWidth - 3, BasePoint.Y + (SegHeight \\ 2) - 1) Case 3
p.Line (BasePoint.X + SegWidth - 1, BasePoint.Y + (SegHeight \\ 2) + 2)-(BasePoint.X + SegWidth - 1, BasePoint.Y + SegHeight)
p.Line (BasePoint.X + SegWidth - 2, BasePoint.Y + (SegHeight \\ 2) + 1)-(BasePoint.X + SegWidth - 2, BasePoint.Y + SegHeight - 1)
p.Line (BasePoint.X + SegWidth - 3, BasePoint.Y + (SegHeight \\ 2) + 2)-(BasePoint.X + SegWidth - 3, BasePoint.Y + SegHeight - 2) Case 4
p.Line (BasePoint.X + 3, BasePoint.Y + SegHeight - 2)-(BasePoint.X + SegWidth - 3, BasePoint.Y + SegHeight - 2)
p.Line (BasePoint.X + 2, BasePoint.Y + SegHeight - 1)-(BasePoint.X + SegWidth - 2, BasePoint.Y + SegHeight - 1)
p.Line (BasePoint.X + 1, BasePoint.Y + SegHeight)-(BasePoint.X + SegWidth - 1, BasePoint.Y + SegHeight) Case 5
p.Line (BasePoint.X, BasePoint.Y + (SegHeight \\ 2) + 2)-(BasePoint.X, BasePoint.Y + SegHeight) p.Line (BasePoint.X + 1, BasePoint.Y + (SegHeight \\ 2) + 1)-(BasePoint.X + 1, BasePoint.Y + SegHeight - 1)
p.Line (BasePoint.X + 2, BasePoint.Y + (SegHeight \\ 2) + 2)-(BasePoint.X + 2, BasePoint.Y + SegHeight - 2) Case 6
p.Line (BasePoint.X, BasePoint.Y + 1)-(BasePoint.X, BasePoint.Y + (SegHeight \\ 2) - 1) p.Line (BasePoint.X + 1, BasePoint.Y + 2)-(BasePoint.X + 1, BasePoint.Y + (SegHeight \\ 2)) p.Line (BasePoint.X + 2, BasePoint.Y + 3)-(BasePoint.X + 2, BasePoint.Y + (SegHeight \\ 2) - 1) Case 7
p.Line (BasePoint.X + 3, BasePoint.Y + (SegHeight \\ 2) - 1)-(BasePoint.X + SegWidth - 3, BasePoint.Y + (SegHeight \\ 2) - 1)
p.Line (BasePoint.X + 2, BasePoint.Y + (SegHeight \\ 2))-(BasePoint.X + SegWidth - 2, BasePoint.Y + (SegHeight \\ 2))
p.Line (BasePoint.X + 3, BasePoint.Y + (SegHeight \\ 2) + 1)-(BasePoint.X + SegWidth - 3, BasePoint.Y + (SegHeight \\ 2) + 1) End Select End Sub
Public Property Let Caption(ByVal Value As String) Dim OrigX As Integer OrigX = BasePoint.X p.Cls
While Value <> \"\"
If Left$(Value, 1) <> \":\" And Left$(Value, 1) <> \".\" Then DrawNumber (Val(Left$(Value, 1)))
BasePoint.X = BasePoint.X + SegWidth + 3 Else
If Left$(Value, 1) = \".\" Then
p.Line (BasePoint.X + (SegWidth \\ 2) - 4, BasePoint.Y + (SegHeight \\ 2) + 6)-(BasePoint.X + (SegWidth \\ 2), BasePoint.Y + (SegHeight \\ 2) + 9), , BF BasePoint.X = BasePoint.X + SegWidth Else
p.Line (BasePoint.X + (SegWidth \\ 2) - 4, BasePoint.Y + (SegHeight \\ 2) - 6)-(BasePoint.X + (SegWidth \\ 2), BasePoint.Y + (SegHeight \\ 2) - 3), , BF
p.Line (BasePoint.X + (SegWidth \\ 2) - 4, BasePoint.Y + (SegHeight \\ 2) + 4)-(BasePoint.X + (SegWidth \\ 2), BasePoint.Y + (SegHeight \\ 2) + 7), , BF BasePoint.X = BasePoint.X + SegWidth End If End If
Value = Right$(Value, Len(Value) - 1) Wend
BasePoint.X = OrigX End Property
Property Let ForeColor(Color As Long) p.ForeColor = Color End Property
Public Sub NewLCD(PBox As PictureBox) Set p = PBox
p.ScaleMode = 3 ' pixel p.AutoRedraw = True BasePoint.X = 2 BasePoint.Y = 2
SegHeight = p.ScaleHeight - 6 SegWidth = (SegHeight \\ 2) + 2 End Sub 窗体中： Option Explicit
Dim lcdTest1 As New mcLCD
Private Sub Form_Load() lcdTest1.NewLCD picture1 End Sub
Private Sub Timer1_Timer() lcdTest1.Caption = Time End Sub
48.将部分菜单放置在窗体的最右段（如帮助等）
在菜单编辑器中在待放置于最右段的菜单前加一标题为空格的菜单，并去掉visable属性前钩号。
Private Type MENUITEMINFO '.......请自己加上啊 End Type
Private Const MFT_RIGHTJUSTIFY = &H4000
'API函数声明
Private Declare Function SetMenuItemInfo Lib \"user32\" Alias \"SetMenuItemInfoA\" (ByVal _ hMenu As Long, ByVal un As Long, ByVal bool As Boolean, lpcMenuItemInfo As _ MENUITEMINFO) As Long
Private Declare Function GetMenuItemInfo Lib \"user32\" Alias \"GetMenuItemInfoA\" (ByVal _ hMenu As Long, ByVal un As Long, ByVal b As Long, lpMenuItemInfo As MENUITEMINFO) As Long Private Declare Function DrawMenuBar Lib \"user32\" (ByVal hwnd As Long) As Long Private Declare Function GetMenu Lib \"user32\" (ByVal hwnd As Long) As Long
'在窗体载入过程（也可放在其他过程）中对菜单设置进行更改 Private Sub Form_Load()
Dim my_menuItemInfo As MENUITEMINFO Dim return_value As Long my_menuItemInfo.cbSize = 44 my_menuItemInfo.fMask = 16 my_menuItemInfo.cch = 128
my_menuItemInfo.dwTypeData = Space$(128)
return_value = GetMenuItemInfo(GetMenu(Me.hwnd), 2, 1, my_menuItemInfo) '这里的2请根据自己的情况而定，为正常显示在左端的菜单数 my_menuItemInfo.fType = MFT_RIGHTJUSTIFY
return_value = SetMenuItemInfo(GetMenu(Me.hwnd), 2, 1, my_menuItemInfo) End Sub
46.List每行以相应的内容为提示
'----------------------By 陈锐------------------------------
'如果你要在Internet或BBS上转贴文章,请通知我知道（没有通知，不知道犯不犯法，呵呵） '这个程序演示如何给List Box的每个列表行加上不同的提示行
'运行该程序，当鼠标移动到任一行上后，弹出的ToolTip就会提示该行的完整内容 'Option Explicit
Private Declare Function SendMessage Lib \"user32\" Alias \"SendMessageA\" _ (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _
lParam As Any) As Long
Private Const LB_ITEMFROMPOINT = &H1A9 Private Sub Form_Load() With List1
.AddItem \"陈锐 ChenReee@Netaddress.com\" .AddItem \"陈锐 Reee-Chen@Netaddress.com\" .AddItem \"陈锐 Chenrui@hotmail.com\" End With End Sub
Private Sub List1_MouseMove(Button As Integer, Shift As Integer, _ X As Single, Y As Single)
' present related tip message Dim lXPoint As Long Dim lYPoint As Long Dim lIndex As Long
If Button = 0 Then ' 如果没有按钮被按下 lXPoint = CLng(X / Screen.TwipsPerPixelX) lYPoint = CLng(Y / Screen.TwipsPerPixelY) With List1
' 获得当前的光标所在的的屏幕位置确定标题位置 lIndex = SendMessage(.hwnd, LB_ITEMFROMPOINT, 0, _ ByVal ((lYPoint * 65536) + lXPoint))
' 显示提示行或清除提示行
If (lIndex >= 0) And (lIndex <= .ListCount) Then .ToolTipText = .List(lIndex) Else
.ToolTipText = \"\" End If End With End If End Sub
47.将部分菜单放置在窗体的最右段（如帮助等）
在菜单编辑器中在待放置于最右段的菜单前加一标题为空格的菜单，并去掉visable属性前钩号。
Private Type MENUITEMINFO
'.......请自己加上啊 End Type
Private Const MFT_RIGHTJUSTIFY = &H4000 'API函数声明
Private Declare Function SetMenuItemInfo Lib \"user32\" Alias \"SetMenuItemInfoA\" (ByVal _ hMenu As Long, ByVal un As Long, ByVal bool As Boolean, lpcMenuItemInfo As _ MENUITEMINFO) As Long
Private Declare Function GetMenuItemInfo Lib \"user32\" Alias \"GetMenuItemInfoA\" (ByVal _ hMenu As Long, ByVal un As Long, ByVal b As Long, lpMenuItemInfo As MENUITEMINFO) As Long
Private Declare Function DrawMenuBar Lib \"user32\" (ByVal hwnd As Long) As Long Private Declare Function GetMenu Lib \"user32\" (ByVal hwnd As Long) As Long '在窗体载入过程（也可放在其他过程）中对菜单设置进行更改 Private Sub Form_Load()
Dim my_menuItemInfo As MENUITEMINFO Dim return_value As Long my_menuItemInfo.cbSize = 44 my_menuItemInfo.fMask = 16 my_menuItemInfo.cch = 128
my_menuItemInfo.dwTypeData = Space$(128)
return_value = GetMenuItemInfo(GetMenu(Me.hwnd), 2, 1, my_menuItemInfo) '这里的2请根据自己的情况而定，为正常显示在左端的菜单数 my_menuItemInfo.fType = MFT_RIGHTJUSTIFY
return_value = SetMenuItemInfo(GetMenu(Me.hwnd), 2, 1, my_menuItemInfo) End Sub
48. 改变屏幕分辨率
Private Declare Function lstrcpy Lib \"kernel32\" Alias \"lstrcpyA\" (lpString1 As Any, lpString2 As Any) As Long
Private Const CCHDEVICENAME = 32 Private Const CCHFORMNAME = 32
Private Const ENUM_CURRENT_SETTINGS = 1 Private Type DEVMODE
.........(请自己添加上） End Type
Private Declare Function ChangeDisplaySettings Lib \"user32\" _ Alias \"ChangeDisplaySettingsA\" (ByVal lpDevMode As Long, ByVal dwflags As Long) As Long
Private Declare Function EnumDisplaySettings Lib \"user32\" Alias \"EnumDisplaySettingsA\" _ (ByVal lpszDeviceName As String, ByVal iModeNum As Long, lpDevMode As Any) As Long
Private Declare Function GetSystemMetrics Lib \"user32\" (ByVal nIndex As Long) As Long Private Const SM_CXSCREEN = 0 Private Const SM_CYSCREEN = 1 Dim pNewMode As DEVMODE Dim pOldMode As Long
Dim nOrgWidth As Integer, nOrgHeight As Integer '设置显示器分辨率的执行函数
Private Function SetDisplayMode(Width As Integer, Height As Integer, Color As Integer) _ As Long ', Freq As Long) As Long
On Error GoTo ErrorHandler
Const DM_PELSWIDTH = &H80000 Const DM_PELSHEIGHT = &H100000 Const DM_BITSPERPEL = &H40000 Const DM_DISPLAYFLAGS = &H200000
Const DM_DISPLAYFREQUENCY = &H400000 With pNewMode
.dmSize = Len(pNewMode)
If Color = 0 Then 'Color = 0 时不更改屏幕颜色 .dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT Else
.dmFields = DM_BITSPERPEL Or DM_PELSWIDTH Or DM_PELSHEIGHT End If
.dmPelsWidth = Width .dmPelsHeight = Height If Color <> 0 Then .dmBitsPerPel = Color End If End With
pOldMode = lstrcpy(pNewMode, pNewMode)
SetDisplayMode = ChangeDisplaySettings(pOldMode, 1) Exit Function ErrorHandler:
MsgBox Err.Description End Function
Private Sub Command1_Click()
Dim nWidth As Integer, nHeight As Integer, nColor As Integer Select Case Combo1.ListIndex Case 0
nWidth = 0: nHeight = 480: nColor = 16 '0*480*16位真彩色,256色nColor _ = 8,16色nColor = 4,nColor = 0 表示不改变颜色 Case 1
nWidth = 0: nHeight = 480: nColor = 24 Case 2
nWidth = 0: nHeight = 480: nColor = 32 Case 3
nWidth = 800: nHeight = 600: nColor = 16 Case 4
nWidth = 800: nHeight = 600: nColor = 24 Case 5
nWidth = 800: nHeight = 600: nColor = 32 Case 6
nWidth = 1024: nHeight = 768: nColor = 16 Case 7
nWidth = 1024: nHeight = 768: nColor = 24 Case 8
nWidth = 1024: nHeight = 768: nColor = 32 Case other
nWidth = 800: nHeight = 600: nColor = 16 End Select
Call SetDisplayMode(nWidth, nHeight, nColor) '注意,系统不支持的显示模式不
'能选，否则准备用安全模式重启动吧. End Sub
Private Sub Form_Load()
Combo1.AddItem \"0*480*16位真彩色\" Combo1.AddItem \"0*480*24位真彩色\" Combo1.AddItem \"0*480*32位真彩色\" Combo1.AddItem \"800*600*16位真彩色\" Combo1.AddItem \"800*600*24位真彩色\" Combo1.AddItem \"800*600*32位真彩色\" Combo1.AddItem \"1024*768*16位真彩色\" Combo1.AddItem \"1024*768*24位真彩色\" Combo1.AddItem \"1024*768*32位真彩色\" Combo1.Text = Combo1.List(0) nOrgWidth = GetDisplayWidth nOrgHeight = GetDisplayHeight
'nOrgWidth = GetSystemMetrics(SM_CXSCREEN)'两种获取初始屏幕大小的方法均可 'nOrgHeight = GetSystemMetrics(SM_CYSCREEN) End Sub
Private Function GetDisplayWidth() As Integer
GetDisplayWidth = Screen.Width \\ Screen.TwipsPerPixelX End Function
Private Function GetDisplayHeight() As Integer
GetDisplayHeight = Screen.Height \\ Screen.TwipsPerPixelY End Function
Private Sub RestoreDisplayMode()
Call SetDisplayMode(nOrgWidth, nOrgHeight, 0) End Sub
Private Sub Form_Unload(Cancel As Integer) RestoreDisplayMode End Sub
49 各种进制转换
Function Bin2Dec(InputData As String) As Double '二进制转变成十进制
Dim DecOut As Double:Dim I As Integer:Dim LenBin As Double:Dim JOne As String LenBin = Len(InputData) '确认是否为二进制数 For I = 1 To LenBin
JOne = Mid(InputData, I, 1)
If JOne <> \"0\" And JOne <> \"1\" Then
MsgBox \"NOT A BINARY NUMBER\ Exit Function End If Next I
DecOut = 0
For I = Len(InputData) To 1 Step -1 If Mid(InputData, I, 1) = \"1\" Then
DecOut = DecOut + 2 ^ (Len(InputData) - I) End If Next I
Bin2Dec = DecOut End Function
Function Dec2Bin(InputData As Double) As String '十进制转变为二进制
Dim Quot As Double:Dim Remainder As Double:Dim BinOut As String:Dim I As Integer Dim NewVal As Double:Dim TempString As String:Dim TempVal As Double Dim BinTemp As String:Dim BinTemp1 As String:Dim PosDot As Integer Dim Temp2 As String
'检查是否为十进制的小数点 If InStr(1, CStr(InputData), \".\") Then
MsgBox \"Only Whole Numbers can be converted\ GoTo eds End If
BinOut = \"\"
NewVal = InputData
DoAgain: '开始计算
NewVal = (NewVal / 2) '如果有余数 If InStr(1, CStr(NewVal), \".\") Then
BinOut = BinOut + \"1\" '得到余数 NewVal = Format(NewVal, \"#0\") NewVal = (NewVal - 1) If NewVal < 1 Then GoTo DoneIt End If Else
BinOut = BinOut + \"0\" If NewVal < 1 Then GoTo DoneIt End If End If
GoTo DoAgain DoneIt:
BinTemp = \"\" '颠倒结果
For I = Len(BinOut) To 1 Step -1 BinTemp1 = Mid(BinOut, I, 1) BinTemp = BinTemp + BinTemp1 Next I
BinOut = BinTemp '输出结果 Dec2Bin = BinOut eds:
End Function
Function Bin2Hex(InputData As String) As String '二进制转变成十六进制
Dim I As Integer:Dim LenBin As Integer:Dim JOne As String:Dim NumBlocks As Integer Dim FullBin As String:Dim HexOut As String:Dim TempBinBlock As String Dim TempHex As String
LenBin = Len(InputData)'确认是否为二进制数 For I = 1 To LenBin
JOne = Mid(InputData, I, 1)
If JOne <> \"0\" And JOne <> \"1\" Then
MsgBox \"NOT A BINARY NUMBER\ Exit Function End If
Next I '设置二进制变量
FullBin = InputData ' 如果这个值的长度小于4,则补0 If LenBin < 4 Then If LenBin = 3 Then FullBin = \"0\" + FullBin ElseIf LenBin = 2 Then FullBin = \"00\" + FullBin ElseIf LenBin = 1 Then FullBin = \"000\" + FullBin ElseIf LenBin = 0 Then
MsgBox \"Nothing Given..\ Exit Function End If
NumBlocks = 1 GoTo DoBlocks End If
If LenBin = 4 Then NumBlocks = 1 GoTo DoBlocks End If
If LenBin > 4 Then
Dim TempHold As Currency Dim TempDiv As Currency Dim AfterDot As Integer Dim Pos As Integer
TempHold = Len(InputData) TempDiv = (TempHold / 4)
Pos = InStr(1, CStr(TempDiv), \".\") If Pos = 0 Then
NumBlocks = TempDiv GoTo DoBlocks End If
AfterDot = Mid(CStr(TempDiv), (Pos + 1)) If AfterDot = 25 Then
FullBin = \"000\" + FullBin
NumBlocks = (Len(FullBin) / 4) ElseIf AfterDot = 5 Then FullBin = \"00\" + FullBin
NumBlocks = (Len(FullBin) / 4) ElseIf AfterDot = 75 Then FullBin = \"0\" + FullBin
NumBlocks = (Len(FullBin) / 4) Else
MsgBox \"Big Time Screw up happened, WAHHHHHHHHHHH\ Exit Function End If
GoTo DoBlocks End If DoBlocks: HexOut = \"\"
For I = 1 To Len(FullBin) Step 4 TempBinBlock = Mid(FullBin, I, 4) If TempBinBlock = \"0000\" Then HexOut = HexOut + \"0\"
ElseIf TempBinBlock = \"0001\" Then HexOut = HexOut + \"1\"
ElseIf TempBinBlock = \"0010\" Then HexOut = HexOut + \"2\"
ElseIf TempBinBlock = \"0011\" Then HexOut = HexOut + \"3\"
ElseIf TempBinBlock = \"0100\" Then HexOut = HexOut + \"4\"
ElseIf TempBinBlock = \"0101\" Then HexOut = HexOut + \"5\"
ElseIf TempBinBlock = \"0110\" Then HexOut = HexOut + \"6\"
ElseIf TempBinBlock = \"0111\" Then HexOut = HexOut + \"7\"
ElseIf TempBinBlock = \"1000\" Then HexOut = HexOut + \"8\"
ElseIf TempBinBlock = \"1001\" Then HexOut = HexOut + \"9\"
ElseIf TempBinBlock = \"1010\" Then HexOut = HexOut + \"A\"
ElseIf TempBinBlock = \"1011\" Then HexOut = HexOut + \"B\"
ElseIf TempBinBlock = \"1100\" Then HexOut = HexOut + \"C\"
ElseIf TempBinBlock = \"1101\" Then HexOut = HexOut + \"D\"
ElseIf TempBinBlock = \"1110\" Then HexOut = HexOut + \"E\"
ElseIf TempBinBlock = \"1111\" Then HexOut = HexOut + \"F\" End If Next I
Bin2Hex = HexOut eds:
End Function
Function Hex2Bin(InputData As String) As String
Dim I As Integer:Dim BinOut As String:Dim Lenhex As Integer InputData = UCase(InputData) Lenhex = Len(InputData) For I = 1 To Lenhex
If IsNumeric(Mid(InputData, I, 1)) Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"A\" Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"B\" Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"C\" Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"D\" Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"E\" Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"F\" Then GoTo NumOk Else
MsgBox \"Number given is not in Hex format\ Exit Function End If NumOk: Next I
BinOut = \"\"
For I = 1 To Lenhex
If Mid(InputData, I, 1) = \"0\" Then BinOut = BinOut + \"0000\"
ElseIf Mid(InputData, I, 1) = \"1\" Then BinOut = BinOut + \"0001\"
ElseIf Mid(InputData, I, 1) = \"2\" Then BinOut = BinOut + \"0010\"
ElseIf Mid(InputData, I, 1) = \"3\" Then BinOut = BinOut + \"0011\"
ElseIf Mid(InputData, I, 1) = \"4\" Then BinOut = BinOut + \"0100\"
ElseIf Mid(InputData, I, 1) = \"5\" Then BinOut = BinOut + \"0101\"
ElseIf Mid(InputData, I, 1) = \"6\" Then BinOut = BinOut + \"0110\"
ElseIf Mid(InputData, I, 1) = \"7\" Then BinOut = BinOut + \"0111\"
ElseIf Mid(InputData, I, 1) = \"8\" Then BinOut = BinOut + \"1000\"
ElseIf Mid(InputData, I, 1) = \"9\" Then BinOut = BinOut + \"1001\"
ElseIf Mid(InputData, I, 1) = \"A\" Then BinOut = BinOut + \"1010\"
ElseIf Mid(InputData, I, 1) = \"B\" Then BinOut = BinOut + \"1011\"
ElseIf Mid(InputData, I, 1) = \"C\" Then BinOut = BinOut + \"1100\"
ElseIf Mid(InputData, I, 1) = \"D\" Then BinOut = BinOut + \"1101\"
ElseIf Mid(InputData, I, 1) = \"E\" Then BinOut = BinOut + \"1110\"
ElseIf Mid(InputData, I, 1) = \"F\" Then BinOut = BinOut + \"1111\" Else
MsgBox \"Something is Screwed up, Wahhhhhhhhhhh\End If Next I
Hex2Bin = BinOut eds:
End Function
Function Hex2Dec(InputData As String) As Double
Dim I As Integer:Dim DecOut As Double:Dim Lenhex As Integer:Dim HexStep As Double DecOut = 0
InputData = UCase(InputData) Lenhex = Len(InputData) For I = 1 To Lenhex
If IsNumeric(Mid(InputData, I, 1)) Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"A\" Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"B\" Then
GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"C\" Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"D\" Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"E\" Then GoTo NumOk
ElseIf Mid(InputData, I, 1) = \"F\" Then GoTo NumOk Else
MsgBox \"Number given is not in Hex format\ Exit Function End If NumOk: Next I
HexStep = 0
For I = Lenhex To 1 Step -1 HexStep = HexStep * 16 If HexStep = 0 Then HexStep = 1 End If
If Mid(InputData, I, 1) = \"0\" Then DecOut = DecOut + (0 * HexStep) ElseIf Mid(InputData, I, 1) = \"1\" Then DecOut = DecOut + (1 * HexStep) ElseIf Mid(InputData, I, 1) = \"2\" Then DecOut = DecOut + (2 * HexStep) ElseIf Mid(InputData, I, 1) = \"3\" Then DecOut = DecOut + (3 * HexStep) ElseIf Mid(InputData, I, 1) = \"4\" Then DecOut = DecOut + (4 * HexStep) ElseIf Mid(InputData, I, 1) = \"5\" Then DecOut = DecOut + (5 * HexStep) ElseIf Mid(InputData, I, 1) = \"6\" Then DecOut = DecOut + (6 * HexStep) ElseIf Mid(InputData, I, 1) = \"7\" Then DecOut = DecOut + (7 * HexStep) ElseIf Mid(InputData, I, 1) = \"8\" Then DecOut = DecOut + (8 * HexStep) ElseIf Mid(InputData, I, 1) = \"9\" Then DecOut = DecOut + (9 * HexStep) ElseIf Mid(InputData, I, 1) = \"A\" Then DecOut = DecOut + (10 * HexStep) ElseIf Mid(InputData, I, 1) = \"B\" Then
DecOut = DecOut + (11 * HexStep) ElseIf Mid(InputData, I, 1) = \"C\" Then DecOut = DecOut + (12 * HexStep) ElseIf Mid(InputData, I, 1) = \"D\" Then DecOut = DecOut + (13 * HexStep) ElseIf Mid(InputData, I, 1) = \"E\" Then DecOut = DecOut + (14 * HexStep) ElseIf Mid(InputData, I, 1) = \"F\" Then DecOut = DecOut + (15 * HexStep) Else
MsgBox \"Something is Screwed up, Wahhhhhhhhhhh\ End If Next I
Hex2Dec = DecOut eds:
End Function
调用方式：
Private Sub cmdbin2hex_Click()
txthex.Text = Bin2Hex(txtbinary.Text) End Sub
Private Sub cmddec2bin_Click() If IsNumeric(txtdec2bin.Text) Then
txtdec2bin2.Text = Dec2Bin(txtdec2bin.Text) End If End Sub
Private Sub cmdDecHex_Click() If IsNumeric(txtDecimal.Text) Then
txtdechex.Text = Hex(CDbl(txtDecimal.Text)) Else
MsgBox \"Not a Number.\End If End Sub
Private Sub cmdhex2bin_Click()
txtbinary2.Text = Hex2Bin(txthex2.Text) End Sub
Private Sub cmdhexdec_Click()
txtdec2.Text = CStr(Hex2Dec(txthexdec.Text)) End Sub
50. 控制左右声道
Private Declare Function mciSendString Lib \"winmm.dll\" Alias \"mciSendStringA\" (ByVal _ lpstrCommand As String, ByVal lpstrReturnString As String, ByVal uReturnLength As _ Long, ByVal hwndCallback As Long) As Long Private Sub Command1_Click()
PlaySound \"F:\\music\\incubus\\水木年华-再见了最爱的人.mp3\"
End Sub
Function PlaySound(ByVal FileName As String) As Boolean Dim cmd As String, exName As String exName = Right(FileName, 3)
mciSendString \"close \" & exName, 0, 0, 0
cmd = \"open \" & FileName & \" alias \" & exName mciSendString cmd, 0, 0, 0
PlaySound = mciSendString(\"play \" & exName, 0, 0, 0) End Function
Private Sub Command2_Click()
Static flag As Boolean ' 设置左声道开关
mciSendString \"set all audio all \" & IIf(flag, \"on\ If flag = False Then
Command2.Caption = \"左声道(关)\" Else
Command2.Caption = \"左声道(开)\" End If
flag = Not flag End Sub
Private Sub Command3_Click()
Static flag As Boolean ' 设置右声道开关
mciSendString \"set all audio all \" & IIf(flag, \"on\ If flag = False Then
Command3.Caption = \"右声道(关)\" Else
Command3.Caption = \"右声道(开)\" End If
flag = Not flag End Sub
Private Sub Command4_Click() '' 设置mp3设备音量:0--1000,500表示音量适中 mciSendString \"set mp3 audio volume to 500\ End Sub
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