Visual Studio Helper - Window which lists all subs / functions of the sourcefile

Here is my idea about it: I cannot imaging the Visual Studio extension which would be as redundant and annoying as the one you suggest to have.

First of all, it contradicts the principles dominated in present-day programming. As you tagged "VB.NET", it suggests you do .NET development. You could be able to understand that the file does not play the role of the programming module, but the assembly does. Not only the file does not present any sound unit in the code, the content of the file might actually make no sense without some other files. For example, remember such thing as the partial class declaration, where different parts can be (and usually are) placed in different files. And, after all, if you have a file loaded in a window, you already can see what's in it, if you use reasonably readable style of coding, of course.

You actually have much better options. Look at the context menu items "Go To Definition" and even "Find All References". Aren't they are really useful?

And finally, let's look at the assembly. The ultimate way of listing all declarations of an assembly (again, this is not really applicable to a source code file) is Reflection. To see how it looks it's enough to compile some assembly and reference it in some project by its executable module (usually *.EXE or *.DLL; yes, you can reference *.EXE as well, those are just file naming which does not matter) by using the "Browse" tab of the "Add Reference" window. You can click on the reference node in Solution explorer. It will load the reflected assembly in the code window, where you can browse all the declarations, see the documentation on each item, all the relevant information.

—SA