General ⇒ Question about indexes in Listings Package (lstlisting)

[peterwilson_69]

Can someone please help me? I'm trying to get a handle on using indexes with the Listings Package. The official documentation is pretty light on sample code and seems to assume I'm a LaTeX expert already - I'm not.

Some simple examples would probably answer all my questions, however I'm struggling to find any.

How do to I index all words in my listing by C++ keyword?
How do to I index all words in my listing by function name?
How do to I index all words in my listing by OpenGL keyword?
How do to I index comments (or different words) in my listing?

Thanks in advance.

[peterwilson_69]

I'm working on a solution and will post here when I'm done.