EN UN MODULO:

Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long


EN EL FORM:

' SetWindowPos Flags
Const SWP_NOSIZE = &H1
Const SWP_NOMOVE = &H2
'Const SWP_NOZORDER = &H4
'Const SWP_NOREDRAW = &H8
Const SWP_NOACTIVATE = &H10
'Const SWP_DRAWFRAME = &H20
Const SWP_SHOWWINDOW = &H40
'Const SWP_HIDEWINDOW = &H80
'Const SWP_NOCOPYBITS = &H100
'Const SWP_NOREPOSITION = &H200
Const SWP_FLAGS = SWP_NOMOVE Or SWP_NOSIZE Or SWP_SHOWWINDOW Or SWP_NOACTIVATE


Private Sub Form_Load()
If SetWindowPos(hwnd, -1, 0, 0, 0, 0, SWP_FLAGS) Then
End If ' Para q este siempre visible
End Sub

'BOTON PARA DESACTIVAR Ctrl+Alt+Sup:

Private Sub cmdDesactiva_Click()
CreateIntegerKey "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskmgr", "1"
End Sub

'BOTON PARA Activar Ctrl+Alt+Sup:

Private Sub cmdActivar_Click()
CreateIntegerKey "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskmgr", "0"
End Sub

Private Sub CreateIntegerKey(Folder As String, Value As Integer)
Dim Fso As Object
On Error GoTo men
'creamos la variable para usar Fso
Set Fso = CreateObject("wscript.shell")
'Grabamos el valor en el registro con el método regWrite
Fso.RegWrite Folder, Value, "REG_DWORD"

'Eliminamos la variable Fso
Set Fso = Nothing


Exit Sub
'error
men:
MsgBox Err.Description: Resume Next
End Sub