VC6 Draw a 3D pie chart

Work need to use the pie chart, looking for a half-day on the internet, also did not find that beautiful 3D pie-like code, are 2D, do not like. Inadvertently, see someone with the. NET implementation of the 3D pie chart, get inspired, simply do it yourself.

In fact, it is very simple to use the pie sector function to draw two of the same, up and down spacing of the split circle. But that's just not enough, you see:

(Figure I)

The parts of the Chinese box need to be fixed. The author of the original text is amended as shown in Figure II:

(Figure II)

However, the author also said that in the pie is thicker or more segmented, because of the angle of the relationship, there will be a phenomenon of leakage. By modifying, I use the correction method shown in Figure three:

(Figure III)