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                       MODES 14h to 1Fh "USER STREAMS"                        
               Normally NOPs, but may  be  defined  by SETESC message to
               invoke FAR routines, one for each mode number on entry to
               handler,
                       DS:SI = first byte of actual stream (not header)
                       CX    = #bytes in stream
                       ES:DI = window's handle | 
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