Returns or sets the hole size for the specified doughnut chart. The hole size must be a value from 0 through 90 (the default value is 50). Read/write Long.
expression.HoleSize
expression Required. An expression that returns a ChChart object.
Remarks
Setting this property to zero (0) changes the doughnut chart to a pie chart (the Type property for the ChChart object returns chChartTypePieStacked).
Example
This example sets hole size for the specified chart. Note that Charts(0) must refer to a doughnut chart.
ChartSpace1.Charts(0).HoleSize = 25