Hello Daniel,

An already existing feature that you can use is RadWatermarkTextBox and its additional content functionality. For example:

<telerik:RadWatermarkTextBox  VerticalAlignment="Center" Width="400" Text="Custom ButtonTextBox control">
	<telerik:RadWatermarkTextBox.AdditionalContent>
		<StackPanel Orientation="Horizontal">
			<telerik:RadButton Content="Btn1" />
			<telerik:RadToggleButton Content="Btn2" Margin="3 0 0 0"/>
		</StackPanel>
	</telerik:RadWatermarkTextBox.AdditionalContent>
</telerik:RadWatermarkTextBox>

Regards,
Martin Ivanov
Progress Telerik

Hello Daniel,

Thank you for the suggestion. We've approved the idea and changed its status to Unplanned. 

In the meantime, you can achieve your requirement using a native TextBox and a StackPanel (or similar host) placed over the text in order to display the additional buttons. I've attached a small example showing this approach. I hope it helps.

I am also posting a link to the Telerik WinForms version of the RadButtonTextBox control. https://docs.telerik.com/devtools/winforms/controls/editors/buttontextbox/getting-started

Regards,
Martin Ivanov
Progress Telerik