One error after compiling using codes:blocks compiler.

[erastus28527]

Hi,i have been trying to make simple graphics but i have never been succesful,another day a friend told to use OpenGL and after looking at the sample it comes with it was what i like,so i got a code from the internet to draw a circle to see how it will work and after compiling i got this one error.
"fatal error:graphic.h:no such file or directory"
pleas help i cant figure out the solution.
Thank you.