If you have modern touchpad on your laptop, with proper drivers, you can define the areas of interest in the "mouse"-section in windows Control panel.
You can define and enable/disable the "scroll up/down" and "scroll left/right" areas which then will be used for scrolling. After that, when you move you finger at selected position, area selected acts just like mouse's roller.
Also, in the same place you can create "hotspots" to the touchpad, to active several actions, with single or double tapping.