Most of the PC laptop touchpads that I have used will scroll the focused control if you run your finger up and down along the rightmost edge (or bottommost for horizontal motion). If yours doesn't, check your control panel settings to see if it can be enabled.

It's not quite the same as a scroll wheel in that there are some programs where one scrolling technique (wheel or trackpad) will work while the other won't, but it's similar enough to handle most cases.