Go to the subdirectory EXE of your game directory and load the
 file LIBDAY.INI into a normal editor. Change the line

 cheats=0

 to

 cheats=1

 and now you have the followinf key combinations in the game:

 [Tab][W] = Win the current mission
 [Tab][L] = Lose the current mission
 [Tab][D] = Get ressources
 [Tab][R] = Shields complete
 [Tab][P] = Get many action points