[Wild.Bill.Kelso]

Just remember that if you exit your game while that key is held down, that Windows will also act like your holding that key down. Windows may act crazy if for instance the key your holding down is the Tab, Delete, Arrows, ect ... The B key may not cause crazy problems but other keys can!

I think even if you closed TB, Windows may still keep that key in the down state until you press it again. I don't think TB is actually 'holding' the key down, it just sends the state of the button to Windows, and Windows keeps it in that 'State' until it's told different from another keypress, or TB macro_deselect.