This function writes a string of character data into the specified profile.
#define INCL_WINSHELLDATA /* Or use INCL_WIN, INCL_PM, */
#include <os2.h>
HINI hini; /* Initialization-file handle. */
PSZ pszApp; /* Application name. */
PSZ pszKey; /* Key name. */
PSZ pszData; /* Text string. */
BOOL rc; /* Success indicator. */
rc = PrfWriteProfileString(hini, pszApp, pszKey,
pszData);