Hello Erawan,
When the focus is moved to another window, the one that owned the focus previously looses it first and then the new owner receives it. Please refer to the attached example that demonstrates this behavior.
Please let me know if I don't understand the issue correctly.
Regards,
Miroslav Nedyalkov
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Explore the
Telerik Public Issue Tracking
system and vote to affect the priority of the items