Const SWP_NOMOVE = &H2
Const SWP_NOSIZE = &H1
Const FLAG = SWP_NOMOVE Or SWP_NOSIZE
Const HWND_TOPMOST = -1
Const HWND_NOTOPMOST = -2
Const HWND_TOP = 0
Const HWND_BOTTOM = 1
Private 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
Private Sub Command1_Click()
Call SetWindowPos(Me.hwnd, HWND_TOPMOST, 0, 0, 0, 0, FLAG)
End Sub

Private Sub Command2_Click()
Call SetWindowPos(Me.hwnd, HWND_NOTOPMOST, 0, 0, 0, 0, FLAG)
End Sub