What should i put in DLL when using it to create global hook?

I'm creating a global hook but the problem is that it needs a DLL but i don't know anything about DLL. So what should i include in the dll 开发者_Go百科file?

You can register as a low level keyboard hook, then you don't have to create a dll.

If you have never created a DLL before, I would suggest starting with something other than a global hook. Maybe a simple tutorial like this, this or this...