Rover 5 control panel

Hello! Sorry i bad speak english.
I have a diploma project with robotino. The task is to write a remote control to move forward, back, to the right, to the left in MatLab program. But I do not know how to do it, maybe anyone have an example of the program?

Previous matlab discussions.

The object of study is the Rover 5. As a control device controller is used Orangutan SVP-324p-based microcontroller
ATmega324p from Atmel. The problem is that to write a simple remote controls (forward, backward, left, right), preferably in an environment Matlab guide user interface.