Const HWND_BOTTOM = 1
Const HWND_TOPMOST = -1
Const HWND_NOTOPMOST = -2
Const SWP_NOSIZE = &H1
Const SWP_NOMOVE = &H2
Const SWP_NOACTIVATE = &H10
Const SWP_SHOWWINDOW = &H40
 
Private Declare Sub 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)

Private Sub Form_Paint()
    SetWindowPos Me.hWnd, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOSIZE Or SWP_NOMOVE
End Sub