)
Values for 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 = number of bytes in stream
		ES:DI = window's handle
SeeAlso: #00446,#00447