Double-click on it. Note down the key combinations it tells you, and press them to activate the built-in cheats.
Some old and manky games disable cheat modules by performing a
*RMClear command to gain memory. You can stop them doing this
by pressing F12 and entering something like:
Set Alias$RMClear Set dHacker$RMClear Stopped
If the !dHacker application has been 'seen' by the filer, this is done automatically.
Making a cheat module
Putting the cheats into action