I am in the same boat (kinda); I am learning C++/Qt from a procedural/interpreted language...blah,blah,blah.

tonnot,
Have you read any C++ books, taken any courses, etc.? The reason I ask is: I am wondering if you mean classes not libraries. If you are just learning C++ you may want to look into "Class inheritance".

Again, I am just an idiot and/or I am still learning this stuff too but you need to compile libraries and link them into your app where as a class you can just inherit. -i.e. link in a binary "thing" (like a .DLL in Windows) into your project vs inherit some procedures via source.

There is also a link at the top of the forum for the WIKI you may want to checkout in between your readings of the Qt docs.