I have this library called BASS which is an audio library which I\'m going to use to record with the microphone. I have all the files needed to use it, but I don\'t know how to
Installing a C++ library means specifying to interested software (eg. a compiler) the location of two kinds of files: headers (typical extensions *.h or .hpp) and compiled objects (.dll or *.lib for instance).
The headers will contain the declarations exposed to the developer by the library authors, and your program will #include them in its source code, the dll will contain the compiled code which will be or linked together and used by your program, and they will be found by the linker (or loaded dynamically, but this is another step).
So you need to
Last but not least, since I see that BASS library is a commercial product, probably they will have made available some installation instructions?