Use touchscreen as secondary monitor?

Hey,
I am currently using a laptop connected to my tv. The tv monitor is my primary display and the laptop screen is my secondary, they are extended to each other.

I am planning to add a third monitor and was thinking of making it touch screen. Would this work? Everything I have read says that if you use a touch screen it has to be the primary display.

Even better would be if I could not have to extend all 3 monitors together and keep my first 2 extended to each other and have the third(touch screen) just run the 1 program I want to use it for.

Sorry if that didnt make alot of sense, Im having trouble trying to word what im trying to ask.

First things first, does your laptop video card support 3 monitors? Just because it has 3 monitor connectors doesn't mean it can actually run three monitors. You didn't give any system info or fill in your system specs in your profile so its hard to give accurate advise.

All im trying to ask is if it is possible to have a touch screen as a non primary monitor, or if ill be wasting money buying a touch screen.

I don't know, I would think you could but don't know for sure. You mentioned adding a third monitor so I just wanted to give you a heads up that you may not be able to run all three at once.