SetActiveWindow( <hWnd> )-> <hPrevWnd>
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 PARAMETER:

  <hWnd>        Is the handle that identifies the window to activate



 RETURNS:

 <hPrevWnd> is the handle of the window that was previously active



 DESCRIPTION:

  SetActiveWindow() makes the specified top-level window the active window. 
  It should be used with care, since it allows an application to arbitrarily 
  take over the active window and input focus. Normally, Windows takes care 
  of all activation. 

 SOURCE:

  SOURCE\WINAPI\WNDCENTE.C