I'd like to write a plugin, that can add text to the formular in the Page/Article-Create/Edit Formular in the Admin-Panel. Therefore, I'd like to have a button (such as the "Link a post" button or something), that opens a new window, where the user can choose from a list, what to add.
Is there still a function in wordpress? Use version 3.x
Could you please help me? Hope you understand my english, I'm from Germany and just had english in school ;-)