This example shows how to get the frame window handle from the client window handle.

#define INCL_WINWINDOWMGR
#define INCL_WINACCELERATORS
#include <OS2.H>

HACCEL haccel;
HWND hwndFrame, hwndClient; /* window handles. */
HAB hab;                    /* anchor block.   */

hwndFrame = WinQueryWindow(hwndClient,
                           QW_PARENT); /* get handle of parent, */
                                       /* which is frame window. */