写了个禁止关闭计算机的模块（原创：唐细刚 2005-5-29）

看到这个问题，顺便写了个模块，方便大家调用：

'mStopShutDown.bas
模块代码：

Private Const GWL_WNDPROC = (-4)
Private Const WM_ENDSESSION = &H16
Private Const WM_QUERYENDSESSION = &H11Private WndProc 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 SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Public Sub HookShutDown(ByVal hWnd As Long)
    If WndProc = 0 Then
       WndProc = SetWindowLong(hWnd, GWL_WNDPROC, AddressOf WindowProc)
    End If
End SubPublic Sub UnHookShutDown(ByVal hWnd As Long)
    If WndProc <> 0 Then
       Call SetWindowLong(hWnd, GWL_WNDPROC, WndProc)
       WndProc = 0
    End If
End SubPrivate Function WindowProc(ByVal hw As Long, ByVal uMsg As Long, ByVal wParam As Long, ByVal 
lParam As Long) As Long
    If uMsg = WM_QUERYENDSESSION Then
       WindowProc = False '为0
       Exit Function
    ElseIf uMsg = WM_ENDSESSION Then
       WindowProc = False '为0
       Exit Function
    End If
    WindowProc = CallWindowProc(WndProc, hw, uMsg, wParam, lParam)
End Function

主窗体代码：

Private Sub Form_Load()
    Call HookShutDown(Me.hWnd)
End SubPrivate Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
    Call UnHookShutDown(Me.hWnd)
End Sub