Hello Robert H.,
Thank you for the writing.
I want to clarify that our RadTextBox hosts the standard textbox internally. This means that it does not support rich text, hence no design-time editor is needed.
Our HTML-like text formatting is a custom rendering engine developed for RadControls for WinForms and providing a text styling mechanism, which can be quickly applied to all Telerik controls and their elements. It enhances one of the smallest element in the Telerik Presentation Framework - the TextPrimitive which shows static and not editable text.
I would kindly ask you to provide us with additional information about the issues concerning the visual elements. This will allow us to address these issues in one of our next versions.
I hope this helps.
the Telerik team
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