in the product specs it is mentioned that it supports RTL:
Right-to-left Language and Localization Support
Due to business globalization, the need for multi-lingual applications is a must. Telerik WinForms Dock supports all RTL languages, such as Hebrew and Arabic. RadDock's window captions, drop-down menus and action buttons (close, pin/unpin, etc) are fully localizable through a simple and intuitive localization provider, or through resources.
I tried a few ways but couldn't make it work.
i need it to support hebrew.
I'm using Q2 2009.