This function sets an unsigned, short integer value into the memory of the reserved window words.

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

HWND      hwnd;   /*  Window handle. */
LONG      index;  /*  Zero-based index of the value to be set. */
USHORT    us;     /*  Unsigned, short integer value to store in the window words. */
BOOL      rc;     /*  Success indicator. */

rc = WinSetWindowUShort(hwnd, index, us);