相关疑难解决方法(0)

我正在尝试使用IFileDialog来选择一个文件夹,以下代码就可以了.问题是我想在浏览时看到某些文件类型和文件夹(例如*.txt).有一个简单的方法吗？

//g_path is a global which will contain the selected folders path
void PickContainer()
{
    IFileDialog *pfd;
    if (SUCCEEDED(CoCreateInstance(CLSID_FileOpenDialog, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pfd))))
    {
        DWORD dwOptions;
        if (SUCCEEDED(pfd->GetOptions(&dwOptions)))
        {
            pfd->SetOptions(dwOptions | FOS_PICKFOLDERS);
        }
        if (SUCCEEDED(pfd->Show(NULL)))
        {
            IShellItem *psi;
            if (SUCCEEDED(pfd->GetResult(&psi)))
            {
                if(!SUCCEEDED(psi->GetDisplayName(SIGDN_DESKTOPABSOLUTEPARSING, &g_path)))
                {
                    MessageBox(NULL, "GetIDListName() failed", NULL, NULL);
                }
                psi->Release();
            }
        }
        pfd->Release();
    }
}