显示AutoCAD线型选择对话框.
(dos_linetypebox [default [T]])
default
默认线型名称.
T
如果指定, 将会显示"ByBlock"和"ByLayer".
如果成功, 返回选择的线型The linetype selected from the list if successful.
nil 取消或出错时.
Command: (dos_linetypebox "Continuous")
"HIDDEN"