Hi Thomas Hellfritsch,
Thank you for writing.
You can create appointment that is all day appointment using the following code snippet:
Appointment app =
When using own data structures you can update the start and end dates after setting the IsAllDay
I hope this helps. If you have further questions, feel free to contact me.
All the best,
the Telerik team
Q3’10 SP1 of RadControls for WinForms is available for download
; also available is the Q1'11 Roadmap
for Telerik Windows Forms controls.