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 SysRefresh()           Lets Windows process all pending messages
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   Syntax:              SysRefresh()  --> <lQuit>


   Parameters:          None.

   Returns:

   <lQuit>              A logical value indicating if a WM_QUIT
                        message was issued, so the app should be
                        finished.

   Observations:        This FiveWin function is extremelly important and
                        has no counterpart in standard Windows API.

                        SysRefresh() processes all pending messages,
                        letting Windows keep controlling all its
                        pending activities.

                        We must use SysRefresh() from inside those
                        processes that may be time consuming.

                        The big benefit and advantadge of SysRefresh()
                        is that it lets us keep doing 'standard' linear
                        programming without having to send ourselves
                        messages to keep processing a long task.

                        Use it in loops, seeks, and any time consuming
                        processes to avoid Windows from losing
                        processing control.

   Sample:              SAMPLES\\TestMMT.prg

   Source code:         Not provided.