Comment by bruno2223

UPX was also good to protect the code, not only for compacting:

1. I used UPX to compact my Delphi EXE file.

2. Then I openned up any HEXA editor

3. looked for "UPX" string and changed to "222x"

Doing this, the UPX unpack tool didn't work and crackers could not easily see or edit my source code with Assembly (as UPX mess with everything!)

Thanks UPX :-)