Just to be sure that we are talking about the same thing - what happens if the form is minimized? Is the CPU loaded to 100%? What happens if the form is restored?
We know that sometimes the CPU gets to 100% for 10 just controls on the form, but in other cases we are able to reproduce it with 200 controls. There is no obvious connection between the controls either.
The behavior is not stable and easily reproducible - it happens just sometimes, and it differs for each machines. For example, on a 3GHz Intel machine with WinXP and 1.5GB RAM, the problem appears with 2 forms opened and with 200 controls in each form. And it is not always happening. On a very similar machine, with similar process running, the 100% CPU utilization can be experienced with just one form with over 200 controls.
We are still researching what/where is the problem (is it on our controls, or is it in another process which interferes with our controls). We will appreciate your project and exact steps to reproduce the problem systematically, i.e. with 100% success. Please, open a support ticket to attach and send us the files.
Thank you in advance.
the Telerik team