Tuner Card dll

[btpoole]

I am very new to C++. I have experience in vb but very little C++. I have an application developed by another that connects to a tuner card and allows the capture of video. The program is very simple, just what I need. I have all of the source code and dll used. My problem is this, the program was written to access a particular card, not the card I actually have. I have a card of the same manufacturer and very similar but a different model. I would like to make a change either to the code or the dll that gathers the card info to direct it to the card installed. My question is what would I be looking for and where. Would this be in
the cpp, h, dll, rgs? Thank you for any guidance.