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─────Run-Time Library───────────────────────────────────────────────────────
 
     The _settextrows function specifies the number of screen rows to
     be used in text modes.
 
     If the constant _MAXTEXTROWS is specified for the <rows>
     argument, the function will choose the maximum number of rows
     available. In text modes, this is 50 rows on VGA, 43 on EGA, and
     25 on others. In graphics modes that support 30 or 60 rows,
     _MAXTEXTROWS specifies 60 rows. In SVGA modes, _MAXTEXTROWS
     specifies the vertical resolution (as returned in a _videoconfig
     struct by the _getvideoconfig function) divided by 8.
     See: _MAXTEXTROWS, _videoconfig
 
     Return Value
 
     This function returns the numbers of rows set. The function
     returns 0 if an error occurred.
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