// UserDropTarget.h: interface for the CUserDropTarget class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_USERDROPTARGET_H__EEF32CBE_6C22_4920_B9DB_08DA9CD933CB__INCLUDED_)
#define AFX_USERDROPTARGET_H__EEF32CBE_6C22_4920_B9DB_08DA9CD933CB__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#define DROPM_DROP					WM_USER + 1978

class CUserDropTarget : public COleDropTarget  
{
public:
	CUserDropTarget();
	virtual ~CUserDropTarget();

protected:
//处理OnDropEx消息是必须的，否则OnDrop函数不会被执行
//当然也可以在OnDropEx函数中处理数据
	virtual DROPEFFECT OnDragEnter(CWnd* pWnd, COleDataObject* pDataObject,
		DWORD dwKeyState, CPoint point);
	virtual DROPEFFECT OnDragOver(CWnd* pWnd, COleDataObject* pDataObject,
		DWORD dwKeyState, CPoint point);
	virtual BOOL OnDrop(CWnd* pWnd, COleDataObject* pDataObject,
		DROPEFFECT dropEffect, CPoint point);
	virtual void OnDragLeave(CWnd* pWnd);
//	virtual DROPEFFECT OnDropEx(CWnd* pWnd, COleDataObject* pDataObject,
//		DROPEFFECT dropEffect, DROPEFFECT dropEffectList, CPoint point);
	public:
		//Static variable to store the window handle of source tree control
		static HWND m_shWndTreeCtrl;
		static long m_lAddressType;
};

#endif // !defined(AFX_USERDROPTARGET_H__EEF32CBE_6C22_4920_B9DB_08DA9CD933CB__INCLUDED_)