Returns or sets the size of the hole in a doughnut chart group. The hole size is expressed as a percentage of the chart size, between 10 and 90 percent. Read/write Long.
Example
This example sets the hole size for doughnut group one in Chart1. The example should be run on a 2-D doughnut chart.
Charts("Chart1").DoughnutGroups(1).DoughnutHoleSize = 10