From: Xtramania on
Try ActiveCompanionSet (www.xtramania.com)

Insert XtraMania :: ActiveCompanionSet \ ActiveX Control,
Choose "Microsoft Rich Edit control",
Place the member on stage, run the movie and type:
put sprite(1).GetObject().Interface()
You will see the ObjectBrowser window that describes what you can do with this
control.

Feel free to ask me further questions if any.