MenuDefProcPtr

MenuDefProcPtr
Header:	Menus.h		Carbon status:	Not Recommended

typedef void(* MenuDefProcPtr) (
    SInt16 message, 
    MenuHandle theMenu, 
    Rect *menuRect, 
    Point hitPt, 
    SInt16 *whichItem
);

You would declare your function like this if you were to name it MyMenuDefCallback:

void MyMenuDefCallback (
    SInt16 message, 
    MenuHandle theMenu, 
    Rect *menuRect, 
    Point hitPt, 
    SInt16 *whichItem
);

Not recommended in Carbon.