Walls object (Excel)
Represents the walls of a 3D chart. This object isn't a collection. There's no object that represents a single wall; you must return all the walls as a unit.
Use the Walls property of the Chart object to return the Walls object.
The following example sets the pattern on the walls for embedded chart one on Sheet1. If the chart isn't a 3D chart, this example fails.
Worksheets("Sheet1").ChartObjects(1).Chart _
.Walls.Interior.Pattern = xlGray75
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