Thank you for replying.
Problem solved!!

I changed my path to start with C:\mingw\bin , but still not working.
Now I tried a basic hello world (from within CodeBlocs directory) and I got an iostream: No such file or directory error. Also tried including iostream.h and iostream.cpp
Uninstalled Dev-C++. (Had to manually delete, since uninstaller said it wasn't installed)
Now Code::Blocks compiler did NOTHING :shock:
Setting>Compiler>Reset defaults
found the correct mingw installation.
Yohooo! hello world and wx compiles and works.
This all would have been easier if I could not only set the GNU GCC compiler as compiler, but also point out the correct installation. (This was done automatically)
Stef