使窗体不可移动

（1）进入类向导，找到对话框的一个方法PreTanslateMessage,点击编辑代码

（2）

               BOOL CMy1_034Dlg::PreTranslateMessage(MSG* pMsg) 
              {
                       if(pMsg->message==WM_NCLBUTTONDOWN)      //截获鼠标左键在标题栏按下消息
                        {
                                    pMsg->message=WM_LBUTTONDOWN;    //  修改为鼠标左键在非标题栏按下的消息
                        }
                       return CDialog::PreTranslateMessage(pMsg);
               }