If you already know Visual Basic or Visual Basic for Applications, VBScript will be very familiar. Even if you don't know Visual Basic, once you learn VBScript, you're on your way to programming with the whole family of Visual Basic languages.
Use a tread depth indicator or gauge. You can use a special tread depth indicator or gauge tool to measure your tire's tread. If you don't already own one, the gauge is cheap to purchase from an auto parts dealer and it's easy to use. You may be able to find a downloadable tread depth gauge by searching online.
Tread depth may be measured in 16ths of an inch, with 5/16 inches being a common depth for a new, all-season tire. Tires are generally unsuitable for snow and rain when their tread depth is less than 3/16 inch, due to the greater traction these conditions require. A deeper tread is needed in snow to maintain maneuverability and control.