I’m trying to add tinyMCE instead of textarea for one of my options in my plugin with no luck so far. I tried this :
http://www.dbuggr.com/smallwei/add-wysiwyg-editor-tinymce-wordpress-plugin/
and this:
There seems to be some problem with styles as styles for tabs (HTML style/Visual style) dont work. Anybody knows about implementation that works 100% with WP 3.0 and up ?
Pre WP 3.3:
http://www.dev4press.com/2010/tutorials/wordpress/tips/add-rich-text-editor-to-your-plugin/
If you are using WP 3.3 or later you might look up wp_editor:
http://codex.wordpress.org/Function_Reference/wp_editor
If I am reading your question correctly:
wordpress.org/extend/plugins/tinymce-advanced/
There’s a checkbox in the options to show the custom styles of the theme.