optional parameters cannot have structure types?

[pacerier]

ok i would just like to know why. optional parameters cannot have structure types?

[jmcilhinney]

Optional parameters actually can have structure types, but only if that structure has a corresponding native data type, e.g. Int32 and Integer. The reason is that the default value for optional parameters must be either a constant or Nothing, but Nothing is only really nothing for reference types. For value types, Nothing is an instance with default values, which doesn't qualify as constant.

[NickThissen]

http://www.vbforums.com/showthread.php?t=420153

When you declare an optional parameter you have to specify a constant as the default value. You cannot do that with a structure unless it is one of the in-built types. Colours are properties of the Color type, i.e. NOT constants. You can declare an optional parameter that is a class type but for the same reason the only default value you can give it is Nothing. The one exception to this is String because it is also an in-built type, even though it's a class.

[jmcilhinney]

Well, at least I'm consistent! Basically the same answer, three and a half years apart. pacerier, hopefully this shows you why you should ALWAYS search before asking a question. There's a very high probability that you're not the first to ask it.

[pacerier]

ok sry 'bout dat, i will try to do more searching in the future before posting