I selected new FLTK project in codeblocks. I chose a name for the project, later it asked me for the location of the folder having FLTK. I pointed it to the tar.gz file which i had downloaded into a folder on the (D) drive, and clicked next. It says
"The path you entered seems valid but the wizard can't locate include directory."
PS: I am using windows 7.
How do I fix this problem? How can I install it?