<font color="#990099" face="Fixedsys" style="line-height: 180%; ">;;;效果:line起点随光标移动,</font>
<font color="#990099" face="Fixedsys" style="line-height: 180%; ">;;; 当捕捉到圆心时,将line起点移动的圆心。</font>
<font color="#990099" face="Fixedsys" style="line-height: 180%; ">;;;日期:zml84 于 2007-09-13 18:00</font>
<font color="#ff0000" face="Fixedsys" style="line-height: 180%; ">(</font><font color="#0000ff" face="Fixedsys" style="line-height: 180%; ">defun</font>
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<font color="#ff00ff" face="Fixedsys" style="line-height: 180%; ">"\n选择LINE对象:"</font><font color="#ff0000" face="Fixedsys" style="line-height: 180%; ">)</font><font color="#ff0000" face="Fixedsys" style="line-height: 180%; ">)</font>
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<font color="#ff0000" face="Fixedsys" style="line-height: 180%; ">(</font><font color="#0000ff" face="Fixedsys" style="line-height: 180%; ">grread</font>
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<font color="#ff0000" face="Fixedsys" style="line-height: 180%; ">(</font><font face="Fixedsys" style="line-height: 180%; ">redraw</font><font color="#ff0000" face="Fixedsys" style="line-height: 180%; ">)</font></pre></span></div> 另外还有这篇文章也可以看看<a href="http://p4.xdcad.net/forum/showthread.php?s=&threadid=623760">http://p4.xdcad.net/forum/showthread.php?s=&threadid=623760</a><br/>在grread状态下实现捕捉功能并显示标记符号
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