control was introduced with our 2013.1.220 release
. If you decide to use it you would need to upgrade.
I hope this helps. Please let me know if you need further assistance.
Telerik by Progress
Check out the Windows Forms project converter, which aids the conversion process from standard Windows Forms applications written in C# or VB to Telerik UI for WinForms. For more information check out this blog post
and share your thoughts.