Pardon my stupidity.
How can I specify a color as an optional arg in a sub with a default, and then pass in a value?

e.g. I tried this and it failed miserably
Optional ByVal RayColor As Color = System.Drawing.Color.White

Color complains
"Optional parameters cannot have structure types"

System.Drawing.Color.White complains
"Constant expression is required"

Thanks, (a very confused) DaveBo