How To Enter Codes In Gs Does Anyone Know Any Codes For The Sims 2 Pets?

Does anyone know any codes for The Sims 2 Pets? - how to enter codes in gs

In the options of the PC game is a key symbol when you enter a code to unlock the secrets, if you play to another, such as the Nintendo DS console have. If you copy and paste, please leave a source!
Thanx