I had some code that I was porting from .NET 1.1 to .NET 2.0 today. The code I had was checking the version of comctl32.dll to see if it was version 6 or greater to determine if the application supported visual styles or not. As I didn’t write that code, I’m not sure if that is a valid way to check for visual style support in .NET 1.1.
I DO know that in .NET 2.0, that check doesn’t necessarily work correctly; however, there is a new way to check that is much easier and more reliable – Application.RenderWithVisualStyles. If you call Application.EnableVisualStyles in your Sub Main method, this boolean will be set to true. That’s all you need to check!
See MSDN documentation here.