how can i use source codes?

i saw many source cods on this forums,
i search for tut on youtube and i found that video:

How to copy paste source code and make dll. - YouTube

i was tried to do the same other source cods that i found here but it just make an error.
did some one can help me?

Anti noob proof code ever think about that? They add codes which peoplehave to take out inorder for it to work.

You have to learn How to compile a file in c++. Search on google for tutorials.