SliderControl 示例代码，如何通过slider控件的拉动同步来改变编辑框的数据-SliderControl to control a edit control varible.

用编辑框和旋转按钮选择矩形的长和宽，线的宽度由滑动块控制，MFC程序和详细步骤，一步一步做。-With the edit box and rotate buttons to select the length and width of the rectangle, line width by a sliding block control, MFC procedures and detailed steps, step by step.