Find existing program path from registry

[hamenkiakehna]

How do I find the path of an existing program, so that I can add some more files to one of its directories?

The program has the registry information under:

SOFTWARE\GRAPHISOFT SE\Archicad 22\

The following code does not work for me:

#define PATH ReadReg(HKEY_LOCAL_MACHINE, "SOFTWARE\GRAPHISOFT SE\Archicad 22\") 
DefaultDirName={#PATH}

[Christophe Fortineau]

Hello hamenkiakehna,

Archicad is available on 2 operating systems.

Perhaps you should tell which one you are talking to get a better answer ?