公园设计，包含各个方位、各个角落、各处景物、各种实物，基于CAD2008实现-Park design, including all directions, every corner, around the scene, various objects, to achieve based on CAD2008

通过图幅编号计算坐标。输入图幅编号，计算图幅左下角的坐标值。-Calculate the coordinates by map sheet numbers. Enter Sheet Number, compute coordinate values lower left corner of the web of FIG.

001 - 获取屏幕角点坐标，002 - StartUndoMark EndUndoMark，003 - 搜索曲线上与一指定点最靠近的点，004 - 求图块内圆的圆心坐标(Matrix)，005 - 调用系统选择文件夹对话框，006 - AutoCAD索引颜色（ACI）与RGB颜色对照表，008 - 自定义Hatch，011 - 将AutoCAD数据转换成字符串(001 - Get screen corner coordinates, 002 - Start UndoMark End Undo