My setup is as follows:
Vizio Mdl. E3D420VX
Comcast cable and Wi-Fi internet. I am using the RED "OK/Select" Comcast remote
Asus notebook computer
Notebook is using Wi-Fi
TV is internet ready

I would like to use the remote to either switch the TV input to the computer or to find an app that will serve the same purpose.
Any ideas? I am inexperienced in these matters.
Bill