Performs case mapping on a string of binary values that represent ASCII characters.

#define INCL_DOSNLS
#include <os2.h>

ULONG           cb;    /*  The length, in bytes, of the string of binary values to be case-mapped. */
PCOUNTRYCODE    pcc;   /*  Pointer to the COUNTRYCODE structure in which the country code and code page are identified. */
PCHAR           pch;   /*  The string of binary characters to be case-mapped. */
APIRET          ulrc;  /*  Return Code. */

ulrc = DosMapCase(cb, pcc, pch);