To type in the cheats, hold down the Ctrl button and press enter, then a 

green cheat window will appear and then type in the cheats. 

Result                      Code

--------------------------------

All units heal            - strong man

Unlimited ammo for units  - Keep ammo

Give Shermon tank         - Get shermon tank

Give mortal infantry      - Get mortel infantry

Give recon infantry       - Get recon infantry

Give rifle infantry       - Get rifle infantry

Give HMG infantry         - Get HMG infantry

Give ammo supply truck    - Get ammo supply truck

Give half track           - Get half track

Give horwitzer half track - Get horwitzer half track

Give field gun            - Get field gun