This instance method is called to allow an object to add additional items to its pop-up menu.
#define INCL_WINWORKPLACE
#include <os2.h>
WPObject *somSelf; /* Pointer to the object on which the method is being invoked. */
HWND hwndMenu; /* Menu handle. */
HWND hwndCnr; /* Handle to container control window. */
ULONG iPosition; /* Position to insert menu items. */
BOOL rc; /* Success indicator. */
rc = _wpModifyPopupMenu(somSelf, hwndMenu,
hwndCnr, iPosition);