http://blogs.msdn.com/mikhailarkhipov/archive/2006/07/14/665340.aspxAs you may know, Visual Web Developer Express only supports Web site projects and you can only have a single project open at a time. It does not support creation of Web Control libraries since Web Control Library is, in fact, a client side project likeen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/mikhailarkhipov/archive/2006/07/14/665340.aspx#668538Mon, 17 Jul 2006 20:28:55 GMT91d46819-8472-40ad-a661-2c78acb4018c:668538mikeI find it even easier to just create the source code as a class file in App_Code in Visual Web Developer. Once I've got it working, if I want to create a deployable assmebly, _then_ I move it to the VB or C# Express IDEs.http://blogs.msdn.com/mikhailarkhipov/archive/2006/07/14/665340.aspx#669152Tue, 18 Jul 2006 06:23:11 GMT91d46819-8472-40ad-a661-2c78acb4018c:669152Mikhail Arkhipov (MSFT)Good point!