Win32 文件拖拽

1.响应系统消息  WM_DROPFILES

2.在响应函数里面获取拖拽文件路径

 LRESULT OnDropFiles(UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     HDROP hDropInfo = (HDROP)wParam;

     TCHAR filePath[*MAX_PATH] = {};

     int nFileCount;

     nFileCount = ::DragQueryFile(hDropInfo , 0xFFFFFFFF, NULL, );//获取文件个数

     //获取拖拽的文件的路径
     for (int i =  ;i < nFileCount ; i++)
     {
          ::DragQueryFile(hDropInfo , i , (LPTSTR)filePath ,);

          std::vector<wstring> vctString(, filePath);

          wstring wstrFile = filePath;

          m_attString.push_back(wstrFile);//文件路径保存下来,CreateMail时使用

          AddFiles(vctString);
     }

     ::DragFinish   (hDropInfo);

     return ;
 }