cad自定义图案填充。画一个单元符号，再指定xy间距，就可以了,不需要过多的单元符号 .-cad custom hatch. Draw a unit symbol, and then specify xy spacing, you can, without too much unit symbol .

批量提取填充边界Batch extraction hatch boundary-Batch extraction hatch boundary

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