监控U盘插入的VB HOTKEY程序示例代码是小编为大家整理的一个vb hotkey例子,本代码不是一个完整的程序,只是一个监控U盘插入的HOTKEY文件代码,里面的一些方法对VB编写类似USB程序非常有帮助,并且代码中有大量的注释可以帮助大家快速理解,,赶紧来看看下面的文章介绍吧:
Attribute VB_Name = "ModHotKey" 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 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 Private Declare Function RegisterHotKey Lib "user32" (ByVal hwnd As Long, ByVal id As Long, ByVal fskey_Modifiers 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 MapVirtualKey Lib "user32" Alias "MapVirtualKeyA" (ByVal wCode As Long, ByVal wMapType As Long) As Long Const WM_HOTKEY = &H312 Const MOD_ALT = &H1 Const MOD_CONTROL = &H2 Const MOD_SHIFT = &H4 Const GWL_WNDPROC = (-4) '注释:窗口函数的地址 Const KEYEVENTF_KEYUP = &H2 '注释:窗口函数的地址 Dim key_preWinProc As Long '注释:用来保存窗口信息 Dim key_Modifiers As Long, key_uVirtKey As Long, key_idHotKey As Long Dim key_IsWinAddress As Boolean '注释:是否取得窗口信息的判断 Public isend As Long '注释:用来保存窗口信息 Const KEY_A = 65 Const KEY_S = 83 Const KEY_P = 80 Const KEY_I = 73 Const KEY_R = 82 Const KEY_N = 78 Const KEY_E = 69 Const KEY_C = 67 Const KEY_O = 79 Const KEY_U = 85 Const KEY_T = 84 Const KEY_V = 86 Const KEY_M = 77 Const KEY_L = 76 Const KEY_Shift = 16 Const KEY_Ctrl = 17 Const KEY_9 = 57 Function keyWndproc(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long On Error Resume Next If Msg = WM_HOTKEY Then Select Case wParam '注释:wParam 值就是 key_idHotKey Case 1 '注释:激活 3 个热键后,3 个热键所对应的操作,大家在其他的程序中,只要修改此处就可以了 Frmmain.WindowState = 0 Frmmain.Show Frmmain.Visible = True Case 2 GoTo aso2 Case 3 StopCopy = 1 Case 4 NoCopys = False Frmmain.Command5.Caption = "暂停监控" Frmmain.Label3.Caption = "当前正处于空闲中!" Case 5 NoCopys = True Frmmain.Command5.Caption = "开始监控" Frmmain.Label3.Caption = "监控已经关闭,对于新插入的U盘将不进行复制!" End Select End If '注释: 将消息传送给指定的窗口 keyWndproc = CallWindowProc(key_preWinProc, hwnd, Msg, wParam, lParam) Exit Function aso2: keyWndproc = CallWindowProc(key_preWinProc, hwnd, Msg, wParam, lParam) ProcUse = False Unload Frmmain End Function Function SetHotkey(ByVal KeyId As Long, ByVal KeyAss0 As String, ByVal Action As String) Dim KeyAss1 As Long Dim KeyAss2 As String Dim i As Long i = InStr(1, KeyAss0, ",") If i = 0 Then KeyAss1 = Val(KeyAss0) KeyAss2 = "" Else KeyAss1 = Right(KeyAss0, Len(KeyAss0) - i) KeyAss2 = Left(KeyAss0, i - 1) End If key_idHotKey = 0 key_Modifiers = 0 key_uVirtKey = 0 If key_IsWinAddress = False Then '注释:判断是否需要取得窗口信息,如果重复取得,再最后恢复窗口时,将会造成程序死掉 '注释: 记录原来的window程序地址 key_preWinProc = GetWindowLong(Frmmain.hwnd, GWL_WNDPROC) '注释: 用自定义程序代替原来的window程序 SetWindowLong Frmmain.hwnd, GWL_WNDPROC, AddressOf keyWndproc End If key_idHotKey = KeyId Select Case Action Case "Add" If KeyAss2 = "Ctrl" Then key_Modifiers = MOD_CONTROL If KeyAss2 = "Alt" Then key_Modifiers = MOD_ALT If KeyAss2 = "Shift" Then key_Modifiers = MOD_SHIFT If KeyAss2 = "Ctrl+Alt" Then key_Modifiers = MOD_CONTROL + MOD_ALT If KeyAss2 = "Ctrl+Shift" Then key_Modifiers = MOD_CONTROL + MOD_SHIFT If KeyAss2 = "Ctrl+Alt+Shift" Then key_Modifiers = MOD_CONTROL + MOD_ALT + MOD_SHIFT If KeyAss2 = "Shift+Alt" Then key_Modifiers = MOD_SHIFT + MOD_ALT key_uVirtKey = Val(KeyAss1) RegisterHotKey Frmmain.hwnd, key_idHotKey, key_Modifiers, key_uVirtKey '注释:向窗口注册系统热键 key_IsWinAddress = True '注释:不需要再取得窗口信息 Case "Del" SetWindowLong Frmmain.hwnd, GWL_WNDPROC, key_preWinProc '注释:恢复窗口信息 UnregisterHotKey Frmmain.hwnd, key_uVirtKey '注释:取消系统热键 key_IsWinAddress = False '注释:可以再次取得窗口信息 End Select End Function
如果监控已经关闭,对于新插入的U盘将不进行复制。