如果要为窗口增加接受Drag&Drop的功能，请按照以下步骤：

1、在OnCreate(...)中调用AcceptDrag(TRUE)。

2、增加消息映射

BEGIN_MESSAGE_MAP(……)

  //{{AFX_MSG_MAP(CDropEdit)

  ON_WM_CREATE()

  ON_WM_DROPFILES() // 关于Drag&Drop的消息

  //}}AFX_MSG_MAP

END_MESSAGE_MAP()

3、处理消息

void CXXXXX::OnDropFiles(HDROP dropInfo)

{

  // 得到Drag&Drop的文件个数

  WORD wNumFilesDropped = DragQueryFile(dropInfo, -1, NULL, 0);

  CString firstFile="";

  //

  for (WORD x = 0 ; x     // 得到PathName的长度,由于第三个参数为NULL，所以调用会失败并返回所需长度

    WORD wPathnameSize = DragQueryFile(dropInfo, x, NULL, 0);

    // 分配memory

    char * npszFile = (char *) LocalAlloc(LPTR, wPathnameSize += 1);

    // 分配错

    if (npszFile == NULL) continue;

    // 再次得到文件名

    DragQueryFile(dropInfo, x, npszFile, wPathnameSize);

    firstFile=npszFile;

       // 如果是shortCut则进行转换得到正确的文件名,expandedFile为最后的文件名

       CString expandedFile = ExpandShortcut(firstFile);

    // 释放memory

    LocalFree(npszFile);

  }

  //完成

  DragFinish(dropInfo);

}

4、关于ExpandShortcut(...)

CString CXXXXX::ExpandShortcut(CString &inFile)

{

  CString outFile = "";

// Make sure we have a path

ASSERT(inFile != _T(""));

IShellLink* psl;

HRESULT hres;

LPTSTR lpsz = inFile.GetBuffer(MAX_PATH);

// Create instance for shell link

hres = ::CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,

IID_IShellLink, (LPVOID*) &psl);

if (SUCCEEDED(hres))

{

// Get a pointer to the persist file interface

IPersistFile* ppf;

hres = psl->QueryInterface(IID_IPersistFile, (LPVOID*) &ppf);

if (SUCCEEDED(hres))

{

// Make sure it's ANSI

WORD wsz[MAX_PATH];

::MultiByteToWideChar(CP_ACP, 0, lpsz, -1, wsz, MAX_PATH);

// Load shortcut

hres = ppf->Load(wsz, STGM_READ);

if (SUCCEEDED(hres)) {

        WIN32_FIND_DATA wfd;

        // find the path from that

        HRESULT hres = psl->GetPath(outFile.GetBuffer(MAX_PATH),

                MAX_PATH,

                &wfd,

                SLGP_UNCPRIORITY);

        outFile.ReleaseBuffer();

}

ppf->Release();

}

psl->Release();

}

  inFile.ReleaseBuffer();

  // if this fails, outFile == ""

return outFile;

}