This example removes the disable-foreground attribute after querying to ensure that the referenced window has this attribute defined.

#define INCL_WINSYS            /* System values           */
#include <os2.h>

HWND  hwnd;                       /* window handle            */
ULONG AttrFound;                  /* attributes found         */
ULONG AttrValue[32];    /* attribute value          */
ULONG cbRetLen;                   /* length of returned value */

WinRemovePresParam(hwnd, PP_DISABLEDFOREGROUNDCOLORINDEX);