I want to use the Visual Studio designer to make controls for my WebPart... I've been pointed to two approaches that seem ok. First, SmartParts... which I'll look into later. Second was to create an ASP.NET User Control, and add it explicitly when creating the webpart, similar to figure 5 in this article. This seems like an easy approach to me.
However, I've found I can't add ASP.NET User Controls to my WebPart Solution (the template doesn't appear to be an option). Alternatively, when I try to create a WebApplication, SharePoint templates are not available. So how do I add a User Control that I can modify with the Visual Designer to a SharePoint Web Part project?
So here is a partial answer. However, when I add that GUID to the front or the back of the two pre-existing Project GUIDs already there, I get the error, "This project type is not supported by this installation." If I add it to the middle of the list, it will load... but the ASP.NET User Control template still doesn't appear as an option.
These are the GUIDs already in use by the webpart project...