This is one of those times when only the hive mind can help - no amount of Google-fu can!
I have an array of structures:
Structure stCar Dim Nam
Assuming that the structure has a property called MPH:
cars = cars.OrderBy(Function(c) c.MPH)
Note: the above code was auto-converted from the following c# code (in case it contains errors):
cars = cars.OrderBy(c => c.MPH);