The usual way of using an RC transmitter with a computer is to buy ... used for a ‘buddy box’, but [sjtrny] had an extra receiver sitting around. Since a receiver simply outputs signals ...
A motor driver that accepts RC signals allows the use of an off the shelf RC transmitter and receiver to control the unit. There is a wonderful video of the machine zipping around smoothly ...
Before buying your RC airplane, make sure you understand what is in the box. Most packages won't include significant components like a receiver, transmitter, and battery (which will cost extra).