I am working in Visual Web Developer 2008 Express and fairly new to Web Development. I have created a new ASP.NET Web Application Project and I understand the .aspx and .vb architecture. However in my .aspx page, I would like to reference and use another dll separate from my code behind page. Is there a way to do this? Every time I try to reference a method inside of the other dll, I get the error: '<blah> is not a member of ASP.default_aspx'