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Visual C++

DropSource.h：源码内容

							#if !defined(AFX_DROPSOURCE_H__20001226_C21E_600E_0DDB_0080AD509054__INCLUDED_)
#define AFX_DROPSOURCE_H__20001226_C21E_600E_0DDB_0080AD509054__INCLUDED_
#pragma once
//////////////////////////////////////////////////////////////////////////////
// CDropSource
class ATL_NO_VTABLE CDropSource : 
   public CComObjectRootEx<CComSingleThreadModel>,
   public IDropSource
{
public:
DECLARE_NOT_AGGREGATABLE(CDropSource)
BEGIN_COM_MAP(CDropSource)
   COM_INTERFACE_ENTRY_IID(IID_IDropSource,IDropSource)
END_COM_MAP()
// IDropSource
public:
   STDMETHOD(QueryContinueDrag)(BOOL bEsc, DWORD dwKeyState)
   {
      if( bEsc ) return ResultFromScode(DRAGDROP_S_CANCEL);
      if( (dwKeyState & MK_LBUTTON)==0 ) return ResultFromScode(DRAGDROP_S_DROP);
      return S_OK;
   }
   STDMETHOD(GiveFeedback)(DWORD)
   {
      return ResultFromScode(DRAGDROP_S_USEDEFAULTCURSORS);
   }
};
#endif // !defined(AFX_DROPSOURCE_H__20001226_C21E_600E_0DDB_0080AD509054__INCLUDED_)

						