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ScreenRetrieve
==============

Syntax
------

     #include <pc.h>
     
     void  ScreenRetrieve(void *buf);

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

This function stores a replica of the current primary screen contents in
the buffer pointed to by BUF.  It assumes without checking that BUF has
enough storage to hold the data.  The required storage can be computed
as `ScreenRows()*ScreenCols()*2' (ScreenRows:, *Note   
ScreenCols::).

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

None.

Example
-------

     unsigned *saved_screen = (unsigned *)alloca(ScreenRows()*ScreenCols()*2;
     
     ScreenRetrieve(saved_screen);