GetCapture() -> <hWnd> 
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 RETURNS

  <hWnd> is the handle that identifies the window that has the mouse 
  capture, or zero if the mouse is not captured at all 


 DESCRIPTION:

  The GetCapture function retrieves a handle of the window that has the 
  mouse capture. A window receives the mouse capture when its handle is 
  passed as the <hwnd> parameter of the SetCapture function. 

  Only one window has the mouse capture at any given time; this window 
  receives mouse input whether or not the cursor is within its borders. 


 SOURCE:

  SOURCE\WINAPI\WMOUSE.C