Windows 작업관리자 차단 및 Alt+F4 키 차단

  Protected Overrides Function ProcessDialogKey(ByVal keyData As System.Windows.Forms.Keys) As Boolean
        Select Case (keyData)
            Case Keys.Control
                Return True
            Case Keys.Alt Or Keys.F4
                Return True
        End Select
        Return MyBase.ProcessDialogKey(keyData)
    End Function




    Private Sub DisableTaskManager()
        Dim regkey As RegistryKey
        Dim keyValueInt As String = "1"
        Dim subKey As String = "Software\Microsoft\Windows\CurrentVersion\Policies\System"
        Try
            regkey = Registry.CurrentUser.CreateSubKey(subKey)
            regkey.SetValue("DisableTaskMgr", keyValueInt, RegistryValueKind.DWord)
            regkey.Close()
        Catch ex As Exception
            MsgBox(ex.Message, MsgBoxStyle.Critical, "Registry Error!")
        End Try

    End Sub

    Private Sub EnableTaskManager()
        Dim regkey As RegistryKey
        Dim keyValueInt As String = "0"    '0x00000000 (0)
        Dim subKey As String = "Software\Microsoft\Windows\CurrentVersion\Policies\System"
        Try
            regkey = Registry.CurrentUser.CreateSubKey(subKey)
            regkey.SetValue("DisableTaskMgr", keyValueInt, RegistryValueKind.DWord)
            regkey.Close()
        Catch ex As Exception
            MsgBox(ex.Message, MsgBoxStyle.Critical, "Registry Error!")
        End Try

    End Sub