Accessing an external DLL functions...

Hey guys...
I wondered...let's say i have the ICQ.
It has some built-in DLL's.
How can I access those DLL's functions with VB?
I mean, Is there any way so I'll be able to "view" or use the functions in a DLL that is not written by me?
P.S: let's say I dont know the functions names in the dll in advance.

Waiting for answer.
Thanks.

First you would need an application that would let you view the entry points into the DLL's. Off the top of my head I can't name one, but I'm sure there are some out there.

Even if you have the names of the functions you would still need to have the calling conventions. If you can get your hands on the C header files it should give you both of these things.

If you get this far. How will you know what the function does ?

I'm not trying to disuade you, this however is a hit & miss task.

Thanks,

Any other ideas?