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If a geode is to draw something in color, it first calls a routine to set which color to use, then calls the appropriate drawing routine. The color can be specified in terms of its palette index or its RGB value. The data specifying which color to use is stored in the GState, with separate color fields to keep track of how to draw lines, areas, and text.</P>
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<CODE>
GrSetLineColor()</CODE>
<A NAME="Shapes_11.htm_IX_GrSetLineColor()">
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 changes the color used when drawing lines. The<CODE>
 G