This function converts a string to uppercase.

#define INCL_WINCOUNTRY /* Or use INCL_WIN, INCL_PM, */
#include <os2.h>

HAB      hab;         /*  Anchor-block handle. */
ULONG    ulCodepage;  /*  Code page. */
ULONG    ulCountry;   /*  Country code. */
PSZ      pszString;   /*  String to be converted to uppercase. */
ULONG    ulRetLen;    /*  Length of converted string. */

ulRetLen = WinUpper(hab, ulCodepage, ulCountry,
             pszString);