C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
Active and Visual Page Functions
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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:   <graph.h>
 
  Syntax:    short _getactivepage( void );
             short _getvisualpage( void );
             short _setactivepage( short page );
             short _setvisualpage( short page );
 
  Returns:   for the get functions, the current page number;
             for the set functions, the previous page number if
             successful, or a negative value if not.
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