C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
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_setvideomode
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─────Run-Time Library───────────────────────────────────────────────────────
 
     The _setvideomode function selects a screen mode appropriate for
     a particular hardware/display configuration. The <mode> argument
     can be one of the manifest constants listed in any of the
     following tables:
     See: Constants for Screen Mode
          VESA Constants for Screen Mode
          _MAXRESMODE and _MAXCOLORMODE Constants for Screen Mode
 
     See also: Hercules Support
 
     Return Value
 
     The function returns the number of text rows if the function is
     successful. If an error is encountered (that is, the mode selected
     is not supported by the current hardware configuration), the
     function returns 0.
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