New version. Same link in original post. It should [doesn't] eliminate any need for external DLLs (such as "msvcr100.dll").

Please let me know if there are any other problems!

Jibb

EDIT: Btw, could someone please move this to "Lite-C Contributions"? Thanks

EDIT2: Same link, same DLL. But now the zip contains msvcr100.dll, which should also be included in your project to make sure there are no issues on computers that haven't got the Microsoft Visual C++ 2010 Redistributable installed.

How do I enable threading so it doesn't interrupt game flow?

It's not in the DLL. Check out how to do multi-threading here. Just have a function whose job it is to open the ports by calling the DLL function (let's call it threadOpenFunc). Then I just go:
I put that in its own function, actually, and it checks and sets a couple of global variables to make sure that such a thread isn't already opening on closing ports, because it would get unpredictable if you were trying to close a port in one thread while opening the same port in another thread.

Jibb

Thanks! I never seen the dll before, I'll look into it. I've installed your .dll with Silas, and it seems to be working good so far. Thanks again for this, and I put your name in the credits.

No need for my name in the credits -- there's very little of my own code. I'm looking forward to trying Silas -- I have a really busy week ahead of me and can't download it just yet, but I'm excited to see you've put a beta in the Projects forum!

The CreateThread function doesn't need a DLL -- all you need to do is #include <windows.h>

Jibb

Ahhh yes, okay. I hope to use the threading for database maybe too. But then again, I'm sure if the database .dll supports it.. does the .dlls need to have some sort of built in support to use threading?

You solved a big problem for me, so that's why the thanks in the credits.

Cheers

I don't think the DLL itself needs to directly support it, but I could be wrong. To be safe, I'd avoid letting related DLL functions run in more than one thread at the same time, lest they interfere with each other.

Jibb