The SetWindowPos API should work for you.
Const HWND_TOPMOST = -1
Const HWND_NOTOPMOST = -2
Const SWP_NOSIZE = &H1
Const SWP_NOMOVE = &H2
Const SWP_FRAMECHANGED = &H20
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)
The in code, the call would be as follows, from within the Form you want to bring topmost.
SetWindowPos Me.hWnd, HWND_TOPMOST, 0, 0, 0, 0, (SWP_FRAMECHANGED Or SWP_NOMOVE Or SWP_NOSIZE)
Thanks and Good Luck!
zemp