C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
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_FP_OFF, _FP_SEG
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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:  <dos.h>
 
  Syntax:   unsigned _FP_OFF( void __far *address );
            unsigned _FP_SEG( void __far *address );
 
  Returns:  (_FP_OFF) an offset.
            (_FP_SEG) a segment address.
 
     NOTE: These macros are not supported by the 32-bit version of the
           compiler.
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