Rotation Property [Excel 2003 VBA Language Reference]
Chart object: Returns or sets the rotation of the 3-D chart view (the rotation of the plot area around the z-axis, in degrees). The value of this property must be from 0 to 360, except for 3-D bar charts, where the value must be from 0 to 44. The default value is 20. Applies only to 3-D charts. Read/write Variant.
Shape or ShapeRange object: Returns or sets the rotation of the shape, in degrees. Read/write Single.
Rotations are always rounded to the nearest integer.
This example sets the rotation of Chart1 to 30 degrees. The example should be run on a 3-D chart.
Charts("Chart1").Rotation = 30