DragDrawingProcPtr

DragDrawingProcPtr
Header:	Drag.h		Carbon status:	Supported

typedef OSErr(* DragDrawingProcPtr) (
    DragRegionMessage message, 
     showRegion, 
    Point showOrigin, 
     hideRegion, 
    Point hideOrigin, 
    void *dragDrawingRefCon, 
    DragRef theDrag
);

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

OSErr MyDragDrawingCallback (
    DragRegionMessage message, 
     showRegion, 
    Point showOrigin, 
     hideRegion, 
    Point hideOrigin, 
    void *dragDrawingRefCon, 
    DragRef theDrag
);

message
showRegion
showOrigin
hideRegion
hideOrigin
dragDrawingRefCon
theDrag

function result: A result code.

AVAILABILITY

Supported in Carbon.