public DragDropEffects StartDrag (IntPtr handle, object data, DragDropEffects allowed_effects) {
IntPtr dragref = IntPtr.Zero;
EventRecord eventrecord = new EventRecord ();
effects = DragDropEffects.None;
NewDrag (ref dragref);
XplatUICarbon.GetGlobalMouse (ref eventrecord.mouse);
StoreObjectInDrag (handle, dragref, data);
TrackDrag (dragref, ref eventrecord, IntPtr.Zero);
DisposeDrag (dragref);
return effects;
}
extern static int TrackDrag (IntPtr dragref, ref EventRecord eventrecord, IntPtr region);
extern static int TrackDrag(IntPtr dragref, ref EventRecord eventrecord, IntPtr region);