鍵盤攔截 ( Ctrl+Alt+Del、Alt+Tab、Ctrl+Esc、Alt+F4、M$ 等組合Hot Key )

肥龍

VB.Net 寫法
:

' API 宣告
Private Declare Sub keybd_event Lib "user32" _

(ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Integer, ByVal dwExtraInfo As Integer)

Private Sub Form1_Load _
(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

ControlTask (True)
End Sub

Private Sub Form1_Closed _
(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Closed

ControlTask (False)
End Sub

Private Sub ControlTask(ByVal blnFlag As Boolean)

Dim strKey As String

blnFlag = Not blnFlag

KeyPreview = True

strKey = "HKCU\software\microsoft\windows\currentversion\policies\"

With CreateObject("WScript.Shell")

.RegWrite(strKey & "system\DisableTaskMgr", blnFlag)

.RegWrite(strKey & "Explorer\NoLogoff", blnFlag)

.RegWrite(strKey & "Explorer\NoClose", blnFlag)

.RegWrite(strKey & "system\DisableLockWorkstation", blnFlag)

.RegWrite(strKey & "system\DisableChangePassword", blnFlag)

.RegWrite(strKey & "Explorer\NoViewContextMenu", blnFlag)

.RegWrite(strKey & "Explorer\NoChangeStartMenu", blnFlag)

.RegWrite(strKey & "Explorer\NoRun", blnFlag)

.RegWrite(strKey & "Explorer\NoSetTaskbar", blnFlag)

End With
End Sub

Private Sub Form1_KeyDown _
(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown

Dim KeyCode As Short = e.KeyCode

Dim Shift As Short = e.KeyData \ 65536

If KeyCode = 91 Or KeyCode = 92 Then

keybd_event(20, 0, 2, 0) ' M$

keybd_event(91, 0, 2, 0) ' M$

End If

If Shift = 4 And KeyCode = 18 Then keybd_event(18, 0, 2, 0) 'Alt+Tab

If Shift = 2 And KeyCode = 17 Then keybd_event(17, 0, 2, 0) 'Ctrl+Esc

If Shift = 4 And KeyCode = 115 Then keybd_event(115, 0, 2, 0) 'Alt+F4

If KeyCode = 112 Then keybd_event(112, 0, 2, 0) 'F1

KeyCode = 0
End Sub