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chart colors & customisation

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Hy,
i'm using c# to create a powerPoint presentation that contains charts. I've added the chart(s) using Graph.Chart, it looks like this:
Expand|Select|Wrap|Line Numbers
  1.  Graph.Chart objChart = (Graph.Chart)objSlide.Shapes.AddOLEObject(xx, yy, 250, 180,
  2.                     "MSGraph.Chart.8", "", MsoTriState.msoFalse, "", 0, "", MsoTriState.msoFalse).OLEFormat.Object;
  3.             objChart.ChartType = Graph.XlChartType.xl3DColumnClustered;
  4.  
I've added data using : dataSheet = objChart.Applic ation.DataSheet ;

Now my problem is that i need to set the color for the chart(i need the columns to be red, and by default there are blue), and i can't find any way to do that. I've tried with objChart.set_Co lors but it doesn't work.

Anyone has any idea how can i do that?

Thanks!
Apr 10 '09 #1
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