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long pascal SendMessage(HWND hWnd, WORD msg, WORD wParam, DWORD lParam)
   <Windows eq.>

  This function calls a window's window procedure directly with the
specified message and arguments. The message will not be placed on
the system message queue.

Parameters
  hWnd is the handle of the window which should receive this message.
   If hWnd is 0xFFFF, then the message will be sent to every top level
   window currently defined.
  msg is the message code which should be passed to the window.
  wParam and lParam contain the argument data for the message.

Returns
  The return value from the hWnd's window procedure.


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