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 SendMessage()          Sends a Windows message to a window
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   Syntax:              SendMessage( <hWnd>, <nMsg>, <nWParam>, <nLParam> )
                                     --> <nLResult>
   Parameters:

   <hWnd>               Identifies the handle of the window to which the
                        message will be sent. If this parameter is
                        HWND_BROADCAST (-1) then it is sent to all windows.

   <nMsg>               Specifies the message to be sent

   <nWParam>            A numeric value specifying 16 bits of additional
                        message dependant information.

   <nLParam>            A numeric value specifying 32 bits of additional
                        message dependant information.

   Returns:

   <nLResult>           The result of the message processing and depends
                        on the message sent.

   Sample:              SAMPLES\\EndApp.prg

   Source code:         SOURCE\\WINAPI\\SendMsg.c

   See also:            PostMessage() PeekMessage()  CLASS TWindow:SendMsg()