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ScreenCols
==========

Syntax
------

     #include <pc.h>
     
     int ScreenCols(void);

Description
-----------

This function returns the number of columns of the screen.  It does so
by looking at the byte at the absolute address 40:4Ah in the BIOS area.
In text modes, the meaning of number of columns is obvious; in graphics
modes, this value is the number of columns of text available when using
the video BIOS functions to write text.

Return Value
------------

The number of columns.

Example
-------


     int available_columns = ScreenCols();