Code::Blocks not working with GTK3 even after editing the script

I am trying to use GTK3 with Code::Blocks. The thing is initially when I was trying to create a GTK project, it gave me an error that it can't find gtk.h. I then edited the wizard script and changed gtk-2.0 to gtk-3.0 as seen in an answer on Stack Overflow.

After doing that, it gave me an error cannot find gtk-win32-2.0. I changed this to gtk-win32-3.0 in the script but the error still persists.

I have both the files gtk.h and gtk-win32-3.0 in the GTK directory. I crosschecked this many times. Can someone help me with this?

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