I will assume that you are using a version of Microsoft Windows as you have given an installation path in that format. I do not use Windows or Code Blocks and you have given very little information about what versions of the software you are using or how you have proceeded so far with the installation.
Have you looked at the installation and manuals for the given bits of software.
Code Blocks at - http://www.codeblocks.org/user-manual
GTK Microsoft Windows installation at (32 bit) - http://www.gtk.org/download/win32.php