Thank you for your reply. Thanks to your reply I found out how I can add button to the HTML Editor. It is in the code of HTML Editor Syntax Highlighter. Thank you for you help.
I meant this plugin.
http://wordpress.org/extend/plugins/html-editor-syntax-highlighter/screenshots/
And Extensible HTML Editor Buttons doesn’t work with it. I am not sure why. I only know that those two plugins does not works together. Maybe the problem is in the HTML Editor Syntax Highlighter. If there is any chance to make those plugins together please tell me. Thank you
