F-Keys problem?

[jojo-gfx]

I miss the F-Keys.
There comes senseless output if I press them.
I have edit the codes in the lib but can't get them in my script. All other codes, who are originaly in the script, are all correct delivered.
Is it not possible to catch the F-Keys?

[jojo-gfx]

Ok, I understand now the problem, but it is no good Idea to leave them "0" in the .h file!
Better here would be ti use the most standard codes, so it works for nearly 90%.
Without codes there is the problem, that with any update of the lib or anyone other uses the lib, the codes are away or from first on not available.
Or is there a better way possible? So they have to implement everytime per user in his code? Was try it but wasn't working...