Dealing with Dll's (c++)

[Rambaldi]

Since i am not use to program in c++, i got this question:

I've been thinking in making a mp3 player in C#, the language i am more confortable dealing with, but instead of using librarys provided by Visual Studio, i want to deal with a library that i can have full knownledge of its code.

I started searching for mp3 projects made in c++ and i found one thats good enough for me. WMp3 C++ class for Windows

My objective is to make a .dll of some functions on that class, the thing is confusing me is the headers/classes that the functions depend on.
Do i have to make a .dll of all the headers/class on the project?? And if i do, theres something i will have to change on the code for a .dll can interact with another .dll??

Please tell me if i you didnt understand my doubt, my english need improvements :D

Thanks in advance.

[Savage]

If I have understood you well then the answer is you do not need to.
You've meant to ask(for e.g):

If that Mp3 player depends on other classes or libraries do you have to make a DLL out of them too?

[Rambaldi]

yeah, that's what i was trying to ask :D so that means that the dll will have all the classes and libraries that the main class depends right?

[Savage]

@Rambaldi
That's correct .