Shape's color change in window dialog

[plz ^^]

I load Visio .vsd file in drawingcontrol window form
When mouse clicked happen, I want to chanage shape's color.
But I don't know
: Visio.VisSectionIndices.???????
For this work, which section do I choice? and How do I write code??


and one more question
in shapesheet
I change Fill Format Section - FillForegnd row value
But the shape's color doesn't change in .vsd file.
I save and close.. I re-open the file but the color doesn't change.
So I confirm right-click style-fill
style-fill's color number has been changed but actually I don't view the
shape's color(changed)
For color changed in shapesheet, How do I do????

please help me..