Write to an EXE in Delphi

I am planning to store the license information of my app to the app itself. Is it possible to write to an EXE in Delphi without affecting its logical function? If yes, How? My colleague says that there are only spe开发者_如何转开发cific parts of the exe that is writable. Is this true?

Why don't you store the license as a resource in your Delphi app rather than hack the EXE?

Example here: http://delphi.about.com/od/objectpascalide/a/embed_resources.htm

Take a look at http://sourceforge.net/projects/tponguard/

You'll find what you want here.

This An In-Depth Look into the Win32 Portable Executable File that will help you. thehackerslibrary.com. File Resource Management Library (.NET) that may work for you.

Create your license variable with start and stop tags. I don't know anything about Delphi programming but in psuedocode it would look like

var license = "$$$$"+"LICENSE DATA"+"$$$$";

You can open the executable in a hex editor and search for the $$$$ part and edit it directly or you can write a program that will overwrite the bit between the tags.