DLL works for web based apps but not stand window apps

I took some of my most used functions and extensions and put them into a DLL so I can include the DLL into any project. This works fine for web based projects but throws an error on stand-alone apps. I do an Imports on the assembly name. I can see the functions and methods but when I try to run I get:

开发者_开发百科{Function Name} is not declared. It may be inaccessible due to its protection level.

Any thoughts?

I have wondered if it is because in the dll I’m doing extensions on some strings and some system.web.ui.webcontrols objects. I didn’t thing this would be a problem because in the dll I’m doing an Imports System.Web.UI.WebControls.

If your function extends a function in System.Web.UI then you will need to add a reference to this in your Windows app.

Without seeing the function declaration, is it marked as internal?