Help with exploit api commands

I'm making a pretty basic exploit, and I have a few questions that I haven't seen others ask about:

1. What's the difference between SendLimitedLuaScript and SendLuaScript? Which one do I use and why?

2. Is there a specific place to include the Dllimport functions? Under the #includes maybe?

3. Do you still need to make an instance of the exploit class?

4. Are there any other DLLimports I need to make for the exploit to work best?

5. Are all functions supported in exploit v1 ACTUALLY available in exploit v2, such as IsAPIAttached()?

I ask these questions because I'm trying to compile with Clang++ and these are related to the errors I'm getting and the exploit v2 download page wasn't nearly as specific as v1, even though it said it has the same features. Thanks in advance.