Perhaps Dr. Kapusta has not understood your question correctly. I think you just want to connect a computer to the old model of spectrophotometer recording spectra on paper. It is possible in most cases, and it is a common problem of analogous/digital interface. But you should go deeply into the electric scheme of UV-Vis device and learn how the electric signals flow and how to produce the required commands from the computer. Then, you will have to connect the detector output to the computer input to get digital signals from analogous ones. It may seem strange, but it is more simple. Then you will be able to get a dependence of output signals on the wavelength. Of course, you will need also a software with a convenient graphical interface. You have to understand that this work would require a good level of knowledge of computer hardware, electric circuits and electronics (at least).