Thank you for writing.
If I understand you correct, you want to get the RadTextBox control from the event handler of the RadTextBoxItem Click event. If this is the case here is a code snippet which demonstrates how to achieve this:
sender, EventArgs e)
RadTextBoxItem textBoxItem = sender
RadTextBoxElement textElement = textBoxItem.FindAncestor<RadTextBoxElement>();
RadTextBox textBox = textElement.ElementTree.Control
If this is not what you meant, I would kindly ask you to provide some more details on your case and what you are trying to do.
I am looking forward to you reply.
the Telerik team