virtual bool Ctrl::DragAndDrop(Point p, const ClipData& d, bool drop);

virtual String GetClip(const char *fmt, int kind);

enum {
	DND_CANCELED = 0,
	DND_COPY = 1,
	DND_MOVE = 2,
};

int DoDragAndDrop(const char *fmts, Ctrl *src, dword actions = DND_MOVE);
int DoDragAndDrop(const char *fmt, const String& data, dword actions = DND_MOVE);

template <class T>
void DoDragAndDrop(const T& data)
{
	DoDragAndDrop(typeid(T).name(), StoreAsString(data));
}

template <class T>
bool Has(const ClipData& data)
{
	return data.Has(typeid(T).name());
}

template <class T>
bool Get(const ClipData& data)
{
	return data.Get(typeid(T).name());
}