Hi Hans Peter,
RadTextBox supports
AutoComplete, however, this functionality allows for only one choice, unlike the implementation in Outlook, where numerous choices are shown. This is a nice feature to have and I have logged it as a feature request in our issue tracking system for possible future implementation.
I updated your Telerik points. If you have additional questions, feel free to contact me.
Greetings,
Nikolay
the Telerik team
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