HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                      unsigned FP_OFF( void far *fptr )

       - prototype in dos.h

       - gets offset of far pointer fptr
       - returns unsigned integer value
       - not available in earlier versions of MS C; use the following:

         #define FP_OFF(fptr)  ((unsigned)(fptr))

       - see   FP_SEG()

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