thank you, but it doesnt work as "intended"
first it was like this:
c:\blabla\otherdirectory\codeblocks\myclass.h
then when i renamed it to "mynewclassname.h"
it went to:
c:\blabla\...\mynewclassname.h
but i want it to show up as:
mynewclassname.h in the project manager