DefWindowProc( hWnd, nMsg, nParam, nlParam ) -> < nResult>
------------------------------------------------------------------------------


 PARAMETER:

  <hwnd>     Handle of the window that received the message

  <nMsg>     Message that is passed to the default procedure

  <nParam>   First message parameter as an INTEGER

  <nlParam>  Second message parameter as a LONG 


 RETURNS:

  The return value is the result of the message processing and depends on
  the message itself.


 DESCRIPTION:

  The DefWindowProc() function calls the default window procedure.
  This Eventhandler provides default action for any window messages that an 
  application does not handle, it therefore ensures that every message is 
  processed.
  The default procedure should be called with the same set of parameters
  as those received by the new window procedure.