SAP GUI Automation

Hello,

for my diploma I have to automate the SAP GUI with ruby. So a ruby script should interact with the SAP GUI like a user: clicking, entering data, ... etc.
Until now I have only done a very simple proof of concept (start the SAP GUI, log in, do some clicks, log out) and I´m not sure how to go on...
So here´s my question: Are there any HowTos, Tutorials, Blog-Entries or similar stuff on that topic? Or has someone of You made expiriences to share with me?

Thanks in advance,
Christian