Convert .Exe File Into Source Code?

[cw2k]

Sample is a Delphi app.
The kind ya asking the answer is no.
You can't just drop the exe into some magical box and out comes to source that can be compiled.

You may open it in ollydbg or IDA(+ Hexrays decompiler) get used to learn ASM and localize that tiny part of the code like serial key checking function or File format that 'interests' you, slowly try to understand that part and reprogram it in some programming language you know or chose to learn.
^= Reverse Engineering