ASPNetSpell can automatically detect all major HTML Text Editors including FCKEditor, CKEditor (CKE), Moxicode Tiny MCE, FreeTextArea , Telerik Rad Editor, AjaxToolKit.Editor and over 200 more! Just set the SpellButton' FieldsToSpellCheck to "EDITORS" or in some cases you can use the control ID's. Should that fail for any reason - target the surrounding HTML element or pannel.