This function returns pointer information.

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

HPOINTER        hptr;              /*  Pointer handle. */
PPOINTERINFO    pptriPointerInfo;  /*  Pointer-information structure. */
BOOL            rc;                /*  Success indicator. */

rc = WinQueryPointerInfo(hptr, pptriPointerInfo);