Thank you for writing.
You can find the answer to your question in the support ticket that you have opened "Appontment Dragging - Color".
A bit off topic, I would like to remind you that posting the same questions multiple times, slows down our responses. This is why, when you have a question and you need urgent response, please use the Support Ticketing System, otherwise if you do not need the response in such a time manner and you would like to share it with the community, use the forums. The usual response time for forum threads is 72 business hours and the Support threads are responded according to your license.
Should you have any other questions, do not hesitate to contact us.
the Telerik team
Q1’11 SP1 of RadControls for WinForms is available for download
; also available is the Q2'11 Roadmap
for Telerik Windows Forms controls.