I got some questions about add customer button.

 

first of all, Is there any sample code to add a customer butto to the tool bar?

secondly, suppose I add a new button to the tool bar, when I click it, a new window popup and I select some link from the popup window, then I want to add some text back to the content inside the editor based on my selection in the popup window. how could I add those text to the content of the editor? Is there any object works for that?

 

Thank you very much!