This function destroys the current cursor, if it belongs to the specified window.

#define INCL_WINCURSORS /* Or use INCL_WIN, INCL_PM, Also in COMMON section */
#include <os2.h>

HWND    hwnd;  /*  Window handle to which the cursor belongs. */
BOOL    rc;    /*  Success indicator. */

rc = WinDestroyCursor(hwnd);