Feel free to use the source in any shareware or freeware program. Please contact the author(s) for permission to use the source in any commercial product.
Vertical hold may be distributed world wide so long as it remains free.
Drop it in, reboot, party on.
Caps Lock will turn on / turn off Vertical Hold. F1 -> F9 will select the module.
No function keys? Buy a copy of CodeWarrior and fix it.