How can I stroke a Polygon along all the segments of it?

Dear all

I want to stroke a Polygon from red to blue along all the segments of it. e.g. start from the beginging segment with red, along the next segment which is connected with the previous one, the color will change smoothly, and so on... till the end segment of Polygon with blue.

The Ploygon is very complex, maybe like a ZigZag, maybe are crossed with each other....

I tried to used LinearGradientBrush and RadialGradientBrush do not work....

Is there any easy method?

thanks~~~

[890 byte] By [StrongZhu] at [2008-1-7]