吊顶哦~~

（1）回传子窗口的参数给主窗口：

           newProject myDig = new newProject();
           DialogResult result = myDig.ShowDialog();//当关闭form2上设置this.DialogResult = DialogResult.OK ;
           if (result == DialogResult.OK)
           {
               //访问myDig的公共属性或芋
               this.WLine = myDig.Wl;
               this.HLine = myDig.Hl;
           }