Please :D

[Burner]

who I can join to me dll of files from Sven-coop or simply Opposing Force at the half life please

[Burner]

so....?

[mirv]

Opposing Force is a commercial game - you can get the dlls for it by buying it. Unless I missed something, sven-coop was a mod, and you should be able to find it somewhere - try www.svencoop.com for instance.

[Burner]

My question is how united two dll files

[mirv]

Short answer: you can't really combine two dll files. What is it you're trying to do with them exactly?

[Burner]

So I want to do a Half Life mode and I can put it to him are monsters of Sven Co-op for example in the MOD can not put my Monster_gonome My question is how can I do that?

[mirv]

Well I'm not the best (long time since I did any modding on half life) but the monsters aren't stored in dll files. They're in another container format (valve's modding tools should be able to open them properly). Unless you mean the code behind monster behaviour - that's a different story.
google + modding tutorials are your best bet here - sorry I'm not the best one to help!