Thank you about your questions.
There is a refresh/invalidate operation every time you move or resize a window, but you actually do not see any flickering if the control is using double buffering. This is the case with the standard panels coming with from the Visual Studio toolbox - they do not support double buffering and there is flickering. There are various techniques which could help you boost the performance. Still, I think that I could help you faster if you send me a very simple project with the exact scenario.
For example, you can try the following:
When you start resizing, simply hide the panels of the tabs and when you finish the resizing, show them again. You can also start a timer in the Resize
event handlers which is stopped in the Tick
event handler of this timer and in the tick handler you can also show the panels.
The property you should use to get the content panel is the ContentPanel
I hope this helps.
the Telerik team