TypeConverters on the compact framework

I'm working on a compact framework project and whilst most of the properties are fairly straight forward (I.e. mark them as browsable in the xmta file), I'm struggling to get this to work for more complex types - on the full framework, I'd just implement a custom TypeConverter and go from there, but it seems the CF TypeConverter doesn't have any of the type converting methods to override, which has left me a li开发者_如何学运维ttle stuck?

It probably should be blindingly obvious but how would I go about supporting design time property support for more complex type?