If you mean CheatEngine, it's a simple matter of "search for value, let it change, then search for new value."
For DDC 1.00b, the values are:
- Lives: th14.exe+F5864
- Bombs: th14.exe+F5870
- Power: th14.exe+F5858
The maximum value for Lives and Bombs are 8, the maximum for power is 400; I recommend setting it to 399 and then grabbing a point-item if you want full-power. Don't freeze it at 400 or it'll act glitchy.