Thank you for contacting us.
This feature is still not implemented in our masked editbox. We will do
our best to implement it in one of the future releases. There is no
workaround for this functionality at the moment because the editing
logic can not be easily changed using the public API of the control.
However please take a look at the following code snippet which will show you how to move programmatically the selection:
RadMaskTextBox textBox = this.radMaskedEditBox1.MaskedEditBoxElement.TextBoxItem.HostedControl as RadMaskTextBox;
Please contact me again if you need more information.
the Telerik team