vc 實作檔案拖放操作: ondropfiles

1/重載wm_dropfiles

2/在form屬性選擇accept files=true

3/在ondropfiles添加如下:

char *lpszFileName=new char[512];
    int nFileCount;
    nFileCount=::DragQueryFile(hDropInfo, 0xFFFFFFFF, NULL, 512);

    if(nFileCount == 1)
    {
        UINT nChars=::DragQueryFile(hDropInfo, 0, &lpszFileName[0], 512);
        CString str(&lpszFileName[0], nChars);
        //
        SetDlgItemText(IDC_FILENAME,str);
       
    }
    else
    {
        ::AfxMessageBox("請勿拖放多個檔案！");
    }

    ::DragFinish(hDropInfo);       //釋放記憶體

    delete []lpszFileName;  
    //
    CDialog::OnDropFiles(hDropInfo);