HelpPC 2.10	Quick Reference Utility	Copyright 1991 David Jurgens
INT 21,68 - Flush Buffer Using Handle   (DOS 3.3+)        AH = 68h        BX = file handle        on return        AX = error code if CF set  (see DOS ERROR CODES)        - flushes DOS buffers to disk, does not update directory entry
Esc or Alt-X to exit	int 21,68	Home/PgUp/PgDn/End ←↑↓→