Tools > Options > General > Vertical line columns (I have mine set to "80 132", as a matter of fact).
To enforce the hard-stop at 132, you could turn on the truncation option.
Document > C/C++ Options > General > Trunctation > Line Length [132]
Another way to partially enforce the hard-stop at 132 would be to enable word wrap at column 132, it depends on what you might find more annoying (text wrapping, or just not being allowed to type or paste beyond that column at all).