The fact that the address of a menu ISN'T given in the IAddress field has
bee quite an annoyance to me, also it wouldn't make sense to give an
IAddress for RAWKEY, you can get the address of the menu item through a
call to ItemAddress(window->MenuStrip,(long)intuimessage->Code), but only
if the Code != MENUNULL. For events such as CLOSEWINDOW, MOUSEMOVE,
REFRESHWINDOW, RAWKEY, etc. you can interrogate the
intuimessage->IDCMPWindow member to find out more stuff.