FirstSliceAngle Property
Returns or sets the angle of the first pie-chart or doughnut-chart slice, in degrees (clockwise from vertical). Applies only to pie, 3-D pie, and doughnut charts. Read/write Long.
Example
This example sets the angle for the first slice in chart group one in Chart1. The example should be run on a 2-D pie chart.
Charts("Chart1").ChartGroups(1).FirstSliceAngle = 15