This method is specific to version 3, or higher, of the OS/2 operating system.

This class method returns a pointer to the object associated with the specified frame window handle.

#define INCL_WINWORKPLACE
#include <os2.h>

M_WPDesktop     *somSelf;    /*  Pointer to the WPDesktop class object. */
HWND             hwndFrame;  /*  Handle to the top-level frame window. */
WPObject        *Object;     /*  Pointer to the object associated with hwndFrame. */

Object = _wpclsQueryObjectFromFrame(somSelf,
           hwndFrame);