SHBrowseForFolder指定初始化显示的目录

int BrowseCallbackProc(HWND hwnd, UINT msg, LPARAM lp, LPARAM pData) 
{ 
    // m_strInitDir为初始化目录
    if (!m_strInitDir.empty())
    {
        if (msg == BFFM_INITIALIZED) 
        { 
            ::SendMessage(hwnd,BFFM_SETEXPANDED,TRUE,(LPARAM)m_strInitDir.c_str());
        } 
        else if (msg == BFFM_SELCHANGED && bFirst)
        {
　　　　　　　bFirst = false;
            ::SendMessage(hwnd,BFFM_SETSELECTION,TRUE,(LPARAM)m_strInitDir.c_str());
        }
    }

    return 0; 
}

void ShowGetDirectoryDialog(HWND m_handle)
{
　　bFirst = true;
    wchar_t szDir[MAX_PATH/2];
    BROWSEINFO bi;
    ITEMIDLIST* pidl = NULL;
    bi.hwndOwner = m_handle;
    bi.pidlRoot = NULL;
    bi.pszDisplayName = szDir;
    bi.lpszTitle = L"请选择文件夹";
    bi.ulFlags = BIF_NEWDIALOGSTYLE | BIF_RETURNFSANCESTORS; 
    bi.lpfn = BrowseCallbackProc; // 回调函数，状态改变时调用该函数
    bi.lParam = 0;
    bi.iImage = 0;
    pidl = SHBrowseForFolder(&bi);   
}