Program over-top of fullscreen

[JBD2]

Ok I tried this code:

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 Const HWND_TOPMOST = -1
Private Const HWND_NOTOPMOST = -2
Private Const SWP_NOMOVE = &H2
Private Const SWP_NOSIZE = &H1
 
Private Sub Form_Load()
Form1.Visible = False
End Sub
 
Private Sub Timer1_Timer()
Form1.Visible = True
Call SetWindowPos(Form1.hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE)
End Sub

And it showed up over other windows, but not the full screen game.