I am not sure if I understand you correctly, but if you are saying that you had a lot of performance issues with some Visual WebGui controls, please tell us which controls and in what context.
Regarding your error "Could not resolve ..." Not sure where that comes from, but if you did wrap an ASP.NET control, you should take a look at one of the tutorials on wrapping ASP.NET controls in the resources section here, and note when you are copying the controlcode, how you must exchange the controlID for "hosted_control_id" to make this work.
You have a few options running web and windows based applications. Take a look at the Deployment page on the Wiki here. It includes some useful references about this subject.
In general, you should regularly explore the Wiki and the Resources section on the website, as we are constantly adding new material to those areas.
Hope this helps,