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[分享] VB入门技巧N例

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 楼主| 发表于 2006-12-24 14:26:38 | 显示全部楼层 |阅读模式
有些是很简单的,正如标题"入门"
希望大家好好看看,好多问题这里都能找到答案,资料是我从网络中搜集来的,今天先发上来一些,希望大家能够从中学到些东西

1. 如何消除textbox中按下回车时的beep声?
  1. Private Sub Text1_KeyPress(KeyAscii As Integer)
  2.   If KeyAscii = 13 Then
  3.      KeyAscii = 0
  4.   End If
  5. End Sub
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2.Textbox获得焦点时自动选中。
  1. Private Sub Text1_GotFocus()
  2.   Text1.SelStart = 0
  3.   Text1.SelLength = Len(Text1.Text)
  4. End Sub
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3.屏蔽textbox控件自身的右键菜单,并显示自己的菜单。
方法一:
  1. Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y _
  2. As Single)
  3.    If Button = 2 Then
  4.      Text1.Enabled = False
  5.      Text1.Enabled = True
  6.      PopupMenu mymenu
  7.    End If
  8. End Sub
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方法二:回调函数
  1. module:
  2. Option Explicit
  3. Public OldWindowProc As Long ' 保存默认的窗口函数的地址
  4. Public Const WM_CONTEXTMENU = &H7B ' 当右击文本框时,产生这条消息
  5. Public Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd _  
  6. As Long, ByVal nIndex As Long) As Long
  7. Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd _  As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
  8. 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
  9. Public Function SubClass_WndMessage(ByVal hWnd As Long, ByVal Msg As Long, ByVal wp _
  10. As Long, ByVal lp As Long) As Long
  11. ' 如果消息不是WM_CONTEXTMENU,就调用默认的窗口函数处理
  12. If Msg <> WM_CONTEXTMENU Then
  13.    SubClass_WndMessage = CallWindowProc(OldWindowProc, hWnd, Msg, wp, lp)
  14.    Exit Function
  15. End If
  16. SubClass_WndMessage = True
  17. End Function
  18. 窗体中:
  19. Private Const GWL_WNDPROC = (-4)
  20. Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y _  
  21. As Single)
  22. If Button = 1 Then Exit Sub
  23.    oldWindowProc = GetWindowLong(Text1.hWnd, GWL_WNDPROC) ' 取得窗口函数的地址
  24.       ' 用SubClass_WndMessage代替窗口函数处理消息
  25.    Call SetWindowLong(Text1.hWnd, GWL_WNDPROC, AddressOf SubClass_WndMessage)
  26. End Sub
  27. Private Sub Text1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
  28.   If Button = 1 Then Exit Sub
  29.     ' 恢复窗口的默认函数
  30.     Call SetWindowLong(Text1.hWnd, GWL_WNDPROC, OldWindowProc)
  31.     PopupMenu mymenu
  32. End Sub
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4. 设置TEXTBOX为只读属性
  1. Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd _
  2. As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
  3. Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd _ As Long, ByVal nIndex As Long) As Long
  4. Private Const GWL_STYLE = (-16)
  5. Private Const EM_SETREADONLY = &HCF
  6. Private Sub Command1_Click()
  7.   Dim l As Long
  8.   If (GetWindowLong(Text1.hwnd, GWL_STYLE) And &H800) Then
  9.      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
  10.      l = SendMessage(Text1.hwnd, EM_SETREADONLY, False, vbNull)
  11.      Text1.BackColor = RGB(255, 255, 255)   '将背景设置为白色
  12.      Command1.Caption = "Read&Write"
  13.    Else
  14.      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
  15.      l = SendMessage(Text1.hwnd, EM_SETREADONLY, True, vbNull)
  16.      Text1.BackColor = vbInactiveBorder   '将背景设置为灰色
  17.      Command1.Caption = "&ReadOnly"
  18.   End If
  19. End Sub
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 楼主| 发表于 2006-12-24 14:28:42 | 显示全部楼层
5. 利用API函数MessageBox代替MSGBOX函数可以使得Timer控件正常工作

  1. 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
  2. Private Sub Command1_Click()
  3.    MsgBox "时钟变的无效了"
  4. End Sub
  5. Private Sub Command2_Click()
  6.    MessageBox Me.hwnd, "时钟正常运行", "hehe", 0
  7. End Sub
  8. Private Sub Timer1_Timer()
  9.   Static i As Integer
  10.   i = i + 1
  11.   Text1.Text = i
  12. End Sub
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6.将窗口置于最上面
  1. 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 _
  2. As Long, ByVal wFlags As Long) As Long
  3. Public Sub SetOnTop(ByVal IsOnTop As Integer)
  4. Dim rtn As Long
  5.     If IsOnTop = 1 Then   
  6.         rtn = SetWindowPos(Form1.hwnd, -1, 0, 0, 0, 0, 3)
  7.     Else
  8.         rtn = SetWindowPos(Form1.hwnd, -2, 0, 0, 0, 0, 3)
  9.     End If
  10. End Sub
  11. Private Sub Command1_Click()
  12.   SetOnTop 1   '将窗口置于最上面
  13. End Sub
  14. Private Sub Command2_Click()
  15.   SetOnTop 0
  16. End Sub
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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:
  1. Public Declare Function CreateMutex Lib "kernel32" Alias "CreateMutexA" _ (lpMutexAttributes As SECURITY_ATTRIBUTES, ByVal bInitialOwner As Long, ByVal lpName _
  2. As String) As Long
  3. Public Type SECURITY_ATTRIBUTES
  4.         nLength As Long
  5.         lpSecurityDescriptor As Long
  6.         bInheritHandle As Long
  7. End Type
  8. Public Const ERROR_ALREADY_EXISTS = 183&
  9. Private Sub Main()
  10.     Dim sa As SECURITY_ATTRIBUTES
  11.     sa.bInheritHandle = 1
  12.     sa.lpSecurityDescriptor = 0
  13.     sa.nLength = Len(sa)
  14.     Debug.Print CreateMutex(sa, 1, App.Title)  '这一行可千万不能删除啊
  15.     Debug.Print Err.LastDllError
  16.     If (Err.LastDllError = ERROR_ALREADY_EXISTS) Then
  17.         MsgBox "More than one instance"
  18.     Else
  19.     Form1.Show
  20.     End If
  21. End Sub
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8.窗体标题栏闪烁
  1. Option Explicit
  2. Private Declare Function FlashWindow Lib "user32" (ByVal hwnd As Long, ByVal bInvert _
  3. As Long) As Long
  4. Private Sub tmrFlash_Timer()
  5.     Static mFlash As Boolean
  6.     FlashWindow hwnd, Not mFlash
  7. End Sub
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8.  拷屏

  1. 方法一:利用模拟键盘
  2. Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, _ ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
  3. Const theScreen = 1
  4. Const theForm = 0
  5. Private Sub Command1_Click()
  6. Call keybd_event(vbKeySnapshot, theForm, 0, 0)  '若theForm改成theScreen则Copy整个Screen
  7. DoEvents
  8. Picture1.Picture = Clipboard.GetData(vbCFBitmap)
  9. End Sub
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 楼主| 发表于 2006-12-24 14:30:43 | 显示全部楼层
9. 为程序注册热键

  1. 方法一:修改注册表
  2. Private Declare Function RegisterHotKey Lib "user32" (ByVal hWnd As Long, ByVal id _
  3. As Long, ByVal fsModifiers As Long, ByVal vk As Long) As Long
  4. Private Declare Function UnregisterHotKey Lib "user32" (ByVal hWnd As Long, ByVal id _
  5. As Long) As Long
  6. 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
  7. Private Declare Function WaitMessage Lib "user32" () As Long
  8. Private Type POINTAPI
  9.     x As Long
  10.     y As Long
  11. End Type
  12. Private Type Msg
  13.     hWnd As Long
  14.     Message As Long
  15.     wParam As Long
  16.     lParam As Long
  17.     time As Long
  18.     pt As POINTAPI
  19. End Type
  20. '  声明常数
  21. Private Const MOD_ALT = &H1
  22. Private Const MOD_CONTROL = &H2
  23. Private Const MOD_SHIFT = &H4
  24. Private Const PM_REMOVE = &H1
  25. Private Const WM_HOTKEY = &H312
  26. Private HotKey_Fg As Boolean
  27. Private Sub Form_Load()
  28.     Dim Message As Msg
  29.     '注册 Ctrl+Y 为热键
  30.     RegisterHotKey Me.hWnd, &HBFFF&, MOD_CONTROL, vbKeyY
  31.     'RegisterHotKey Me.hWnd, &HBFF2&, MOD_CONTROL, vbKeyU
  32.     Me.Show
  33.     Form1.Hide
  34.     '等待处理消息
  35.     HotKey_Fg = False
  36.     Do While Not HotKey_Fg
  37.         '等待消息
  38.         WaitMessage
  39.         '检查是否热键被按下
  40.         If PeekMessage(Message, Me.hWnd, WM_HOTKEY, WM_HOTKEY, PM_REMOVE) Then
  41.             Form1.Show 1
  42.             End If
  43.         '转让控制权,允许操作系统处理其他事件
  44.         DoEvents
  45.     Loop
  46. End Sub
  47. Private Sub Form_Unload(Cancel As Integer)
  48.     HotKey_Fg = True
  49.     '撤销热键的注册
  50.     Call UnregisterHotKey(Me.hWnd, &HBFFF&)
  51. End Sub
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方法二:SendMessage
  1. 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
  2. Private Const WM_SETHOTKEY = &H32
  3. Private Const HOTKEYF_SHIFT = &H1
  4. Private Const HOTKEYF_ALT = &H4
  5. Private Sub Form_Load()
  6.    Dim l As Long
  7.    Dim wHotkey As Long
  8.    wHotkey = (HOTKEYF_ALT) * (2 ^ 8) + 65  '定义ALT+A为热键
  9.    l = SendMessage(Me.hwnd, WM_SETHOTKEY, wHotkey, 0)
  10. End Sub
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 楼主| 发表于 2006-12-24 14:32:27 | 显示全部楼层
10.在状态栏显示无边框窗体图标。
  1. Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd _ As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
  2. Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd _ As Long, ByVal nIndex As Long) As Long
  3. Const GWL_STYLE = (-16&)
  4. Const WS_SYSMENU = &H80000
  5. Private Sub Form_Load()
  6. 'Make Form's Icon visible in the taskbar
  7. SetWindowLong Me.hWnd, GWL_STYLE, GetWindowLong(Me.hWnd, GWL_STYLE) Or WS_SYSMENU
  8. End Sub
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11. 记录窗体的大小及位置和程序中的一些设置
  1. Private Sub Form_Load()
  2.     Me.Width = GetSetting(App.Title, Me.Name, "Width", 7200)
  3.     Me.Height = GetSetting(App.Title, Me.Name, "Height", 6300)
  4.     Me.Top = GetSetting(App.Title, Me.Name, "Top", 100)
  5.     Me.Left = GetSetting(App.Title, Me.Name, "Left", 100)
  6.     Check1.Value = GetSetting(App.Title, Me.Name, "check1", 0)
  7. End Sub
  8. Private Sub Form_Unload(Cancel As Integer)
  9.     Call SaveSetting(App.Title, Me.Name, "Width", Me.Width)
  10.     Call SaveSetting(App.Title, Me.Name, "Height", Me.Height)
  11.     Call SaveSetting(App.Title, Me.Name, "Top", Me.Top)
  12.     Call SaveSetting(App.Title, Me.Name, "Left", Me.Left)
  13.     Call SaveSetting(App.Title, Me.Name, "check1", Check1.Value)
  14. End Sub
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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
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 楼主| 发表于 2006-12-24 14:35:01 | 显示全部楼层
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:
  1. Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
  2. If Button = 2 Then
  3. PopupMenu Form2.mymenu
  4. End If
  5. End Sub
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14.创建圆角无边框窗体
  1. 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
  2. Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
  3. Private Declare Function SetWindowRgn Lib "user32" (ByVal hwnd As Long, ByVal hrgn As _ Long, ByVal bRedraw As Boolean) As Long
  4. Private Sub Form_Load()
  5.      hround = CreateRoundRectRgn(0, 0, ScaleX(Form1.ScaleWidth, vbTwips, vbPixels), _ ScaleY(Form1.ScaleHeight, vbTwips, vbPixels), 20, 20)
  6. SetWindowRgn Me.hwnd, hround, True
  7. DeleteObject hround
  8. End Sub
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15.拖动没有标题栏的窗体
方法一:
  1. Private Declare Function ReleaseCapture Lib "user32" () As Long
  2. 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
  3. Private Const HTCAPTION = 2
  4. Private Const WM_NCLBUTTONDOWN = &HA1
  5. Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
  6.    Dim ncl As Long
  7.    Dim rel As Long
  8.    If Button = 1 Then
  9.      i = ReleaseCapture()
  10.      ncl = SendMessage(hwnd, WM_NCLBUTTONDOWN, HTCAPTION, 0)
  11.    End If
  12. End Sub
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方法二:回调函数
  1. 'module:
  2. Public Const GWL_WNDPROC = (-4)
  3. Public Const WM_NCHITTEST = &H84
  4. Public Const HTCLIENT = 1
  5. Public Const HTCAPTION = 2
  6. 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
  7. Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd As _
  8. Long,  ByVal nIndex As Long) As Long
  9. Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As _
  10. Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
  11. Public prevWndProc As Long
  12. Function WndProc(ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal _Param As Long) As Long
  13. WndProc = CallWindowProc(prevWndProc, hWnd, Msg, wParam, lParam)
  14.    If Msg = WM_NCHITTEST And WndProc = HTCLIENT Then
  15.    WndProc = HTCAPTION
  16.    End If
  17. End Function
  18. 窗体中:
  19. Private Sub Form_Load()
  20.    prevWndProc = GetWindowLong(Me.hWnd, GWL_WNDPROC)
  21.    SetWindowLong Me.hWnd, GWL_WNDPROC, AddressOf WndProc
  22. End Sub
  23. Private Sub Form_Unload(Cancel As Integer)
  24.   SetWindowLong Me.hWnd, GWL_WNDPROC, prevWndProc
  25. End Sub
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 楼主| 发表于 2006-12-24 14:36:06 | 显示全部楼层
16. 半透明窗体
  1. Private Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, _ ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long
  2. Private Const WS_EX_LAYERED = &H80000
  3. Private Const LWA_ALPHA = &H2
  4. Private Const GWL_EXSTYLE = (-20)
  5. Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal _
  6. hwnd As Long, ByVal nIndex As Long) As Long
  7. Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal _
  8. hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
  9. Private Sub Form_Load()
  10.    Dim rtn As Long
  11.    rtn = GetWindowLong(Me.hwnd, GWL_EXSTYLE)  '取的窗口原先的样式
  12.    rtn = rtn Or WS_EX_LAYERED    ' 使窗体添加上新的样式WS_EX_LAYERED
  13.    SetWindowLong Me.hwnd, GWL_EXSTYLE, rtn   ' 把新的样式赋给窗体
  14.    SetLayeredWindowAttributes Me.hwnd, 0, 200, LWA_ALPHA
  15. End Sub
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17.开机启动(函数及常数声明略)
  1. Private Sub Form_Load()
  2.    Dim hKey As Long, SubKey As String, Exe As String
  3.    SubKey = "Software\Microsoft\Windows\CurrentVersion\Run"
  4.    Exe = "可执行文件的路径"   
  5.    RegCreateKey HKEY_CURRENT_USER, SubKey, hKey
  6.    RegSetvalueEx hKey, "autorun", 0, REG_SZ, ByVal Exe,LenB(StrConv(Exe, vbFromUnicode)) + 1
  7.    RegCloseKey hKey
  8. End Sub
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18.关闭显示器
  1. Private Declare Function SendMessage Lib "user32" Alias  "SendMessageA" (ByVal hwnd _
  2. As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
  3. Const WM_SYSCOMMAND = &H112&
  4. Const SC_MONITORPOWER = &HF170&
  5. Private Sub Command1_Click()
  6.     SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MONITORPOWER, ByVal 2& '关闭显示器
  7. End Sub
  8. Private Sub Command2_Click()
  9.     SendMessage Me.hwnd, WM_SYSCOMMAND, SC_MONITORPOWER, ByVal -1& '打开显示器
  10. End Sub
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19. 在程序结束时自动关闭由SHELL打开的程序。
  1. Private Const PROCESS_QUERY_INFORMATION = &H400  '关闭由SHELL函数打开的文件
  2. Private Const PROCESS_TERMINATE = &H1
  3. Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, _ ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
  4. Private Declare Function TerminateProcess Lib "kernel32" (ByVal hProcess As Long, _
  5. ByVal uExitCode As Long) As Long
  6. Dim ProcessId As Long
  7. Private Sub Command1_Click()
  8.     ProcessId = Shell("notepad.exe.", vbNormalFocus)
  9. End Sub
  10. Private Sub Form_Unload(Cancel As Integer)
  11.     Dim hProcess  As Long
  12.     hProcess = OpenProcess(PROCESS_TERMINATE Or PROCESS_QUERY_INFORMATION, False, _ ProcessId)
  13.     Call TerminateProcess(hProcess, 3838)
  14. End Sub
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20. 关闭、重启计算机
  1. Public Declare Function ExitWindowsEx Lib "user32" Alias "ExitWindowsEx" (ByVal _
  2. uFlags As Long, ByVal dwReserved As Long) As Long
  3. ExitWindowsEx 1,0 关机
  4. ExitWindowsEx 0,1 重新启动
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21.显示关机提示框
  1. Private Declare Function SHRestartSystemMB Lib "shell32" Alias "#59" (ByVal hOwner _
  2. As Long, ByVal sExtraPrompt As String,  

  3. ByVal uFlags As Long) As Long
  4. Const EWX_LOGOFF = 0
  5. Const EWX_SHUTDOWN = 1
  6. Const EWX_REBOOT = 2
  7. Const EWX_FORCE = 4
  8. Const EWX_POWEROFF = 8
  9. Private Sub Command1_Click()
  10. SHRestartSystemMB Me.hWnd, PROMPT, EWX_LOGOFF
  11. End Sub
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 楼主| 发表于 2006-12-24 14:37:01 | 显示全部楼层
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
  1. Private Declare Function SetParent Lib "user32" (ByVal hWndChild As Long, ByVal _ hWndNewParent As Long) As Long
  2. Private Sub Command1_Click()
  3.     With ProgressBar1
  4.         .Max = 1000
  5.         Dim i As Integer
  6.         For i = 1 To 1000
  7.             .Value = i
  8.         Next i
  9.     End With
  10. End Sub
  11. Private Sub Form_Load()
  12.     ProgressBar1.Appearance = ccFlat
  13.     SetParent ProgressBar1.hWnd, StatusBar1.hWnd
  14.     ProgressBar1.Left = StatusBar1.Panels(1).Left
  15.     ProgressBar1.Top = 100
  16.     ProgressBar1.Width = StatusBar1.Panels(1).Width - 50
  17.     ProgressBar1.Height = StatusBar1.Height - 150
  18. End Sub   '相对位置你可以自己再调一下
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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:
  1. Private  Declare Sub InitCommonControls Lib "comctl32.dll" ()
  2. Private Sub Form_Initialize()
  3.     InitCommonControls
  4. End Sub
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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。
  1. <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  2. <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
  3. <assemblyIdentity
  4. version="1.0.0.0"
  5. processorArchitecture="X86"
  6. name="CompanyName.ProductName.YourApp"
  7. type="win32"
  8. />
  9. <description>Your application description here.</description>
  10. <dependency>
  11. <dependentAssembly>
  12. <assemblyIdentity
  13. type="win32"
  14. name="Microsoft.Windows.Common-Controls"
  15. version="6.0.0.0"
  16. processorArchitecture="X86"
  17. publicKeyToken="6595b64144ccf1df"
  18. language="*"
  19. />
  20. </dependentAssembly>
  21. </dependency>
  22. </assembly>
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 楼主| 发表于 2006-12-24 14:37:55 | 显示全部楼层
25.如何打印PictureBox中的所有控件

添加另外一个PictureBox,然后:
  1. Private Const WM_PAINT = &HF
  2. Private Const WM_PRINT = &H317
  3. Private Const PRF_CLIENT = &H4&
  4. Private Const PRF_CHILDREN = &H10&
  5. Private Const PRF_OWNED = &H20&
  6. Private Const PHYSICALOFFSETX As Long = 112
  7. Private Const PHYSICALOFFSETY As Long = 113
  8. Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd _
  9. As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
  10. Private Declare Function GetDeviceCaps Lib "gdi32" (ByVal hdc As Long, ByVal nindex _
  11. As Long) As Long
  12. private Sub Form_Load()
  13.     Picture1.AutoRedraw = True
  14.     Picture2.AutoRedraw = True
  15.     Picture2.BorderStyle = 0
  16.     Picture2.Visible = False
  17. End Sub
  18. Private Sub Command2_Click()
  19.     Dim retval As Long, xmargin As Single, ymargin As Single
  20.     Dim x As Single, y As Single
  21.     x = 1: y = 1
  22.     With Printer
  23.       .ScaleMode = vbInches
  24.       xmargin = GetDeviceCaps(.hdc, PHYSICALOFFSETX)
  25.       xmargin = (xmargin * .TwipsPerPixelX) / 1440
  26.       ymargin = GetDeviceCaps(.hdc, PHYSICALOFFSETY)
  27.       ymargin = (ymargin * .TwipsPerPixelY) / 1440
  28.       Picture2.Width = Picture1.Width
  29.       Picture2.Height = Picture1.Height
  30.       DoEvents
  31.       Picture1.SetFocus
  32.       retval = SendMessage(Picture1.hwnd, WM_PAINT, Picture2.hdc, 0)
  33.       retval = SendMessage(Picture1.hwnd, WM_PRINT, Picture2.hdc, _
  34.       PRF_CHILDREN + PRF_CLIENT + PRF_OWNED)
  35.       DoEvents
  36.       Printer.Print ""
  37.       .PaintPicture Picture2.Image, x - xmargin, y - ymargin
  38.       .EndDoc
  39.       End With
  40. End Sub
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26.冒泡排序
  1. Sub BubbleSort(List() As Double)
  2. Dim First As Double, Last As Double
  3. Dim i As Integer, j As Integer
  4. Dim Temp As Double
  5. First = LBound(List)
  6. Last = UBound(List)
  7. For i = First To Last - 1
  8. For j = i + 1 To Last
  9. If List(i) > List(j) Then
  10. Temp = List(j)
  11. List(j) = List(i)
  12. List(i) = Temp
  13. End If
  14. Next j
  15. Next i
  16. End Sub
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 楼主| 发表于 2006-12-24 14:39:17 | 显示全部楼层
27.清空回收站

  1. Private Declare Function SHEmptyRecycleBin Lib "shell32.dll" Alias _
  2. "SHEmptyRecycleBinA" (ByVal hwnd As Long, ByVal pszRootPath As String, _
  3. ByVal dwFlags As Long) As Long
  4. Private Declare Function SHUpdateRecycleBinIcon Lib "shell32.dll" () As Long
  5. Private Const SHERB_NOCONFIRMATION = &H1
  6. Private Const SHERB_NOPROGRESSUI = &H2
  7. Private Const SHERB_NOSOUND = &H4
  8. Private Sub Command1_Click()
  9. Dim retval As Long  ' return value
  10.     retval = SHEmptyRecycleBin(RecycleBin.hwnd, "", SHERB_NOPROGRESSUI) ' 清空回收站, 确认
  11.     ' 若有错误出现,则返回回收站图示
  12.         If retval <> 0 Then  ' error
  13.         retval = SHUpdateRecycleBinIcon()
  14.     End If
  15. End Sub
  16. Private Sub Command2_Click()
  17.     Dim retval As Long  ' return value
  18.     ' 清空回收站, 不确认
  19.     retval = SHEmptyRecycleBin(RecycleBin.hwnd, "", SHERB_NOCONFIRMATION)
  20.       ' 若有错误出现,则返回回收站图示
  21.     If retval <> 0 Then  ' error
  22.         retval = SHUpdateRecycleBinIcon()
  23.     End If
  24.     Command1_Click
  25. End Sub
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28.获得系统文件夹的路径
  1. Private Declare Function GetSystemDirectory Lib "kernel32" Alias _
  2. "GetSystemDirectoryA" (ByVal lpBuffer As String, ByVal nSize As Long) As Long
  3. Private Sub Command1_Click()
  4.    Dim syspath As String
  5.    Dim len5 As Long
  6.    syspath = String(255, 0)
  7.    len5 = GetSystemDirectory(syspath, 256)
  8.    syspath = Left(syspath, InStr(1, syspath, Chr(0)) - 1)
  9.    Debug.Print "System Path : "; syspath
  10. End Sub
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29.动态增加控件并响应事件
  1. Option Explicit
  2.     '通过使用WithEvents关键字声明一个对象变量为新的命令按钮
  3.     Private WithEvents NewButton As CommandButton
  4. '增加控件
  5.     Private Sub Command1_Click()
  6.      If NewButton Is Nothing Then
  7.      '增加新的按钮cmdNew
  8.      Set NewButton = Controls.Add("VB.CommandButton", "cmdNew", Me)
  9.      '确定新增按钮cmdNew的位置
  10.       NewButton.Move Command1.Left + Command1.Width + 240, Command1.Top
  11.       NewButton.Caption = "新增的按钮"
  12.       NewButton.Visible = True
  13.      End If
  14.     End Sub
  15.     '删除控件(注:只能删除动态增加的控件)
  16.     Private Sub Command2_Click()
  17.      If NewButton Is Nothing Then
  18.       Else
  19.       Controls.Remove NewButton
  20.         Set NewButton = Nothing
  21.        End If
  22.     End Sub
  23.     '新增控件的单击事件
  24.     Private Sub NewButton_Click()
  25.        MsgBox "您选中的是动态增加的按钮!"
  26.     End Sub
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30.得到磁盘序列号
  1. Function GetSerialNumber(strDrive As String) As Long
  2.   Dim SerialNum As Long
  3.   Dim Res As Long
  4.   Dim Temp1 As String
  5.   Dim Temp2 As String
  6.    Temp1 = String$(255, Chr$(0))
  7.    Temp2 = String$(255, Chr$(0))
  8.    Res = GetVolumeInformation(strDrive, Temp1, Len(Temp1), SerialNum, 0, 0, Temp2, _
  9. Len(Temp2))
  10.    GetSerialNumber = SerialNum
  11. End Function
  12. 调用形式   Label1.Caption = GetSerialNumber("c:")
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31.打开屏幕保护
  1. Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd _
  2. As Long, ByVal wMsg As Long, ByVal wParam  

  3. As Long, lParam As Any) As Long
  4. '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
  5. Const WM_SYSCOMMAND = &H112
  6. '这个参数指明了我们让系统启动屏幕保护
  7. Const SC_SCREENSAVE = &HF140&
  8. Private Sub Command1_Click()
  9. SendMessage Me.hwnd, WM_SYSCOMMAND, SC_SCREENSAVE, 0
  10. End Sub
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32.获得本机IP地址
方法一:利用Winsock控件
winsockip.localip
方法二:
  1. Private Const MAX_IP = 255
  2.     Private Type IPINFO
  3.      dwAddr As Long
  4.      dwIndex As Long
  5.      dwMask As Long
  6.      dwBCastAddr As Long
  7.      dwReasmSize As Long
  8.      unused1 As Integer
  9.      unused2 As Integer
  10.     End Type
  11.     Private Type MIB_IPADDRTABLE
  12.      dEntrys As Long
  13.      mIPInfo(MAX_IP) As IPINFO
  14.     End Type
  15.     Private Type IP_Array
  16.      mBuffer As MIB_IPADDRTABLE
  17.      BufferLen As Long
  18.     End Type
  19.     Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination _
  20. As Any, Source As Any, ByVal Length As  

  21. Long)
  22.     Private Declare Function GetIpAddrTable Lib "IPHlpApi" (pIPAdrTable As Byte, _
  23. pdwSize As Long, ByVal Sort As Long) As Long
  24.     Dim strIP As String
  25.     Private Function ConvertAddressToString(longAddr As Long) As String
  26.      Dim myByte(3) As Byte
  27.      Dim Cnt As Long
  28.      CopyMemory myByte(0), longAddr, 4
  29.      For Cnt = 0 To 3
  30.      ConvertAddressToString = ConvertAddressToString + CStr(myByte(Cnt)) + "."
  31.      Next Cnt
  32.      ConvertAddressToString = Left$(ConvertAddressToString, Len(ConvertAddressToString) - 1)
  33.     End Function
  34.       
  35.     Public Sub Start()
  36.      Dim Ret As Long, Tel As Long
  37.      Dim bBytes() As Byte
  38.      Dim Listing As MIB_IPADDRTABLE
  39.      On Error GoTo END1
  40.      GetIpAddrTable ByVal 0&, Ret, True
  41.      If Ret <= 0 Then Exit Sub
  42.      ReDim bBytes(0 To Ret - 1) As Byte
  43.      GetIpAddrTable bBytes(0), Ret, False

  44. CopyMemory Listing.dEntrys, bBytes(0), 4
  45.      strIP = "你机子上有 " & Listing.dEntrys & " 个 IP 地址。" & vbCrLf
  46.      strIP = strIP & "------------------------------------------------" & vbCrLf & vbCrLf
  47.      For Tel = 0 To Listing.dEntrys - 1
  48.      CopyMemory Listing.mIPInfo(Tel), bBytes(4 + (Tel * Len(Listing.mIPInfo(0)))), Len _(Listing.mIPInfo(Tel))
  49.      strIP = strIP & "IP 地址 : " & ConvertAddressToString(Listing.mIPInfo(Tel).dwAddr)  & vbCrLf
  50.      Next
  51.      Exit Sub
  52. END1:
  53.      MsgBox "ERROR"
  54.     End Sub
  55. Private Sub Form_Load()
  56.      Start
  57.      MsgBox strIP
  58. End Sub
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 楼主| 发表于 2006-12-24 14:40:59 | 显示全部楼层
33. 用键盘方向键控制COMBOX
  1. Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
  2.         (ByVal hwnd As Long, _
  3.         ByVal wMsg As Long, _
  4.         ByVal wParam As Long, _
  5.         lParam As Any) As Long
  6. Const CB_SHOWDROPDOWN = &H14F
  7. Dim bDrop As Boolean
  8. Private isDo As Boolean
  9. Private Sub Combo1_Click()
  10. If Not isDo Then
  11.         isDo = True                   '<----------回置状态
  12.         Exit Sub
  13. Else: MsgBox "safd"
  14.     End If
  15. End Sub
  16. Private Sub Combo1_DropDown()
  17.     bDrop = True
  18. End Sub
  19. Private Sub Combo1_KeyDown(KeyCode As Integer, Shift As Integer)
  20.     If KeyCode = 40 Then
  21.       isDo = False
  22.         SendMessage Combo1.hwnd, CB_SHOWDROPDOWN, 1, 0
  23. ElseIf KeyCode = 38 Then
  24.       isDo = False
  25.         If Combo1.ListIndex = 0 Then
  26.             If bDrop Then
  27.                 bDrop = False
  28.                 SendMessage Combo1.hwnd, CB_SHOWDROPDOWN, 0, 0
  29.             End If
  30.         End If
  31.     End If
  32. End Sub
  33. Private Sub Combo1_KeyUp(KeyCode As Integer, Shift As Integer)
  34. If Combo1.Text = Combo1.List(0) Then
  35. isDo = True
  36. End If
  37. End Sub
  38. Private Sub Form_Load()
  39.     isDo = True
  40.     Combo1.AddItem "abcd"
  41.     Combo1.AddItem "abcd1"
  42.     Combo1.AddItem "abcd2"
  43.     Combo1.AddItem "abcd3"
  44. End Sub
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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:

  
  1. Private Sub Command1_Click()
  2.    Dim CRC() As Byte
  3.    Dim d() As Byte '待传输数据
  4.    ReDim d(2) As Byte
  5.    d(0) = 123
  6.    d(1) = 112
  7.    d(2) = 135
  8.    CRC = CRC16(d) '调用CRC16计算函数
  9.    'CRC(0)为高位
  10.    'CRC(1)为低位
  11.   End Sub
  12.   注意:在数据传输时CRC的低位可能在前,而高位在后。

  13.   Function CRC16(data() As Byte) As String
  14.    Dim CRC16Lo As Byte, CRC16Hi As Byte   'CRC寄存器
  15.    Dim CL As Byte, CH As Byte        '多项式码&HA001
  16.    Dim SaveHi As Byte, SaveLo As Byte
  17.    Dim i As Integer
  18.    Dim Flag As Integer
  19.    CRC16Lo = &HFF
  20.    CRC16Hi = &HFF
  21.    CL = &H1
  22.    CH = &HA0
  23.    For i = 0 To UBound(data)
  24.     CRC16Lo = CRC16Lo Xor data(i) '每一个数据与CRC寄存器进行异或
  25.     For Flag = 0 To 7
  26.      SaveHi = CRC16Hi
  27.      SaveLo = CRC16Lo
  28.      CRC16Hi = CRC16Hi \ 2      '高位右移一位
  29.      CRC16Lo = CRC16Lo \ 2      '低位右移一位

  30. If ((SaveHi And &H1) = &H1) Then '如果高位字节最后一位为1
  31.       CRC16Lo = CRC16Lo Or &H80   '则低位字节右移后前面补1
  32.      End If              '否则自动补0
  33.      If ((SaveLo And &H1) = &H1) Then '如果LSB为1,则与多项式码进行异或
  34.       CRC16Hi = CRC16Hi Xor CH
  35.       CRC16Lo = CRC16Lo Xor CL
  36.      End If
  37.     Next Flag
  38.    Next i
  39.    Dim ReturnData(1) As Byte
  40.    ReturnData(0) = CRC16Hi       'CRC高位
  41.    ReturnData(1) = CRC16Lo       'CRC低位
  42.    CRC16 = ReturnData
  43.   End Function
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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。

  
  1. Private Function CRC16(data() As Byte) As String
  2.    Dim CRC16Hi As Byte
  3.    Dim CRC16Lo As Byte
  4.    CRC16Hi = &HFF
  5.    CRC16Lo = &HFF
  6.    Dim i As Integer
  7.    Dim iIndex As Long
  8.    For i = 0 To UBound(data)
  9.     iIndex = CRC16Lo Xor data(i)
  10.     CRC16Lo = CRC16Hi Xor GetCRCLo(iIndex)    '低位处理
  11.     CRC16Hi = GetCRCHi(iIndex)          '高位处理
  12.    Next i
  13.    Dim ReturnData(1) As Byte
  14.    ReturnData(0) = CRC16Hi    'CRC高位
  15.    ReturnData(1) = CRC16Lo    'CRC低位
  16.    CRC16 = ReturnData
  17.   End Function

  18.   'CRC低位字节值表
  19.   Function GetCRCLo(Ind As Long) As Byte
  20.    GetCRCLo = Choose(Ind + 1, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40,  

  21. &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1,  

  22. &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80,  

  23. &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0,  

  24. &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0,  

  25. &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81,  

  26. &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, _
  27. &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80,  

  28. &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0,  

  29. &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1,  

  30. &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81,  

  31. &H40, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H0, &HC1, &H81, &H40, &H1,  

  32. &HC0, &H80, &H41, &H0, &HC1, &H81, &H40, &H1, &HC0, &H80, &H41, &H1, &HC0, &H80, &H41, &H0, &HC1, &H81, &H40)
  33.   End Function

  34.   'CRC高位字节值表
  35.   Function GetCRCHi(Ind As Long) As Byte

  36. GetCRCHi = Choose(Ind + 1, &H0, &HC0, &HC1, &H1, &HC3, &H3, &H2, &HC2, &HC6, &H6, &H7, &HC7, &H5, &HC5, &HC4, &H4,  

  37. &HCC, &HC, &HD, &HCD, &HF, &HCF, &HCE, &HE, &HA, &HCA, &HCB, &HB, &HC9, &H9, &H8, &HC8, &HD8, &H18, &H19, &HD9, &H1B, &HDB,  

  38. &HDA, &H1A, &H1E, &HDE, &HDF, &H1F, &HDD, &H1D, &H1C, &HDC, &H14, &HD4, &HD5, &H15, &HD7, &H17, &H16, &HD6, &HD2, &H12, &H13,  

  39. &HD3, &H11, &HD1, &HD0, &H10, &HF0, &H30, &H31, &HF1, &H33, &HF3, &HF2, &H32, &H36, &HF6, &HF7, &H37, &HF5, &H35, &H34, &HF4,  

  40. &H3C, &HFC, &HFD, &H3D, &HFF, &H3F, &H3E, &HFE, &HFA, &H3A, &H3B, &HFB, &H39, &HF9, &HF8, &H38, &H28, &HE8, &HE9, &H29, &HEB,  

  41. &H2B, &H2A, &HEA, &HEE, &H2E, &H2F, &HEF, &H2D, &HED, &HEC, &H2C, &HE4, &H24, &H25, &HE5, &H27, &HE7, &HE6, &H26, &H22, &HE2,  

  42. &HE3, &H23, &HE1, &H21, &H20, &HE0, &HA0, &H60, _
  43. &H61, &HA1, &H63, &HA3, &HA2, &H62, &H66, &HA6, &HA7, &H67, &HA5, &H65, &H64, &HA4, &H6C, &HAC, &HAD, &H6D, &HAF, &H6F, &H6E,  

  44. &HAE, &HAA, &H6A, &H6B, &HAB, &H69, &HA9, &HA8, &H68, &H78, &HB8, &HB9, &H79, &HBB, &H7B, &H7A, &HBA, &HBE, &H7E, &H7F, &HBF,  

  45. &H7D, &HBD, &HBC, &H7C, &HB4, &H74, &H75, &HB5, &H77, &HB7, &HB6, &H76, &H72, &HB2, &HB3, &H73, &HB1, &H71, &H70, &HB0, &H50,  

  46. &H90, &H91, &H51, &H93, &H53, &H52, &H92, &H96, &H56, &H57, &H97, &H55, &H95, &H94, &H54, &H9C, &H5C, &H5D, &H9D, &H5F, &H9F,  

  47. &H9E, &H5E, &H5A, &H9A, &H9B, &H5B, &H99, &H59, &H58, &H98, &H88, &H48, &H49, &H89, &H4B, &H8B, &H8A, &H4A, &H4E, &H8E, &H8F,  

  48. &H4F, &H8D, &H4D, &H4C, &H8C, &H44, &H84, &H85, &H45, &H87, &H47, &H46, &H86, &H82, &H42, &H43, &H83, &H41, &H81, &H80, &H40)
  49.   End Function
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