http://blog.youkuaiyun.com/liulianglin/article/details/16883145
CFileDialog dlgPath(TRUE,"tsw",NULL,OFN_HIDEREADONLY|OFN_CREATEPROMPT,"impeller工程文件(*.tsw)|*.tsw|所有(*.*)|*.*||",NULL);
dlgPath.m_ofn.lpstrTitle = "请选择工程路径";
if (dlgPath.DoModal() == IDOK )
{
CString proPath = dlgPath.GetPathName();
m_Path = proPath;
SetDlgItemText(IDC_EDIT_PROJECTPATH,(LPCTSTR)proPath);
}