How to access chart in PowerPoint via VSTO?

I am trying to access charts in slides in PowerPoint 2007 via VSTO, and I am a bit confused. While the Interop provides a property Shape.HasChart which properly finds shapes that have/are charts, I can't figure out how to access the Chart object itself. I don't see a chart property on the Shape. Am I supposed to cast the Shape to a specific type?开发者_如何学运维

Looking into the documentation, it seems that charts were not well-supported initially in Office 2007, but it's not clear to me whether there is a way to access the Chart and do things like change the title or the axis. Any pointers would be highly appreciated!

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You need to access the OLEFormat.Object of the Shape.

Graph.Chart aChart = (Graph.Chart) pptSlide.Shapes[1].OLEFormat.Object;
aChart.Activate();

I can do this successfully with Office 2003.

I goggled a bit and apparently with 2007 SP2 there is a way to get a your shape object a .Chart property. I do not have 2007, so I can not test this.