Error when i try to in stall mysql

I am new new to developer on rails. i have problem when i try to use command “rails install mysql” it said like this picture.

Thanks you,

On windows I think you need to install the DevKit(http://rubyinstaller.org/add-ons/devkit/), inside the devkit you will find instructions on how to patch your ruby installation to be able to compile native extensions.

Also make sure you have mysql server installed.

My best,

Ian