请教关于mapinfo符号的问题

<P>各位大侠，小弟初学mapbasic，想请教制作独立值专题图时如何自定义符号的问题</P>
<P>下面一个例子：</P>
<P>shade 1 with 名称 ignore "" values
  "阀门" Brush (2,16711680,16777215) Pen (1,2,0) Symbol ("Bank10-32.bmp",8388608,24,2) ,
  "水表" Brush (2,65280,16777215) Pen (1,2,0) Symbol ("ONEW2-32.BMP",255,24,2) ,
  "消防栓" Brush (2,255,16777215) Pen (1,2,0) Symbol (76,16711680,24,"MapInfo Real Estate",0,0)
  default Symbol (40,0,12)   # color 1 # </P>
<P>请问是如何得到消防栓的符号的，像16711680,这种参数如何得来
</P>

<P>Bank10-32.bmp是自定义的位图符号,引用Mapinfo安装目录下的\Customb\Bank10-32.bmp</P><P>16711680,65280,255是颜色代号,怎么来算来的还不清楚</P>

<P>哦</P><P>谢谢指点</P><img src="images/post/smile/dvbbs/em07.gif" />