Can you help me to install the gtk library in Dev c++. I have installed it in Linux but i dont know how to install it in Windows.

Thanks in advance.

Gtk+ can be a real pain on Windows.
I got it to work after several attempts.
There is a GTK+ installer for windows available on the website.
The main problem arises, when you need to compile your GTK+ code.
My team used Code::Block IDE on windows. But we were not able to configure it so that it could compile our GTK+ code. So we used the command line( we used Msys with MinGW) to compile our program, thereafter suffer no problem.

I am not remembering the EXACT steps we took. But you will surely get it to work if you search the web.