Cheat Codes are entered during the game:
Heroes of Might & Magic 2: The succession Wars: Cheat Codes Free Download
101111 – more gold
101495 – Instant Local Investigation
123456789 – Good luck
1911 – to the last level
844690 – + crystals
844691 – + pyd
899101 – + precious stones (gems)
32167 – Add 5 Black Dragons to any hero
8675309 – show all map
1313 – play
911 – Victory (looks like nothing?)