VioReadCharStr

#define INCL_VIO

USHORT  rc = VioReadCharStr(CharStr, Length, Row, Column, VioHandle);

PCH              CharStr;       /* Character buffer */
PUSHORT          Length;        /* Length of buffer */
USHORT           Row;           /* Starting row location */
USHORT           Column;        /* Starting column location */
HVIO             VioHandle;     /* Video handle */

USHORT           rc;            /* return code */