Hi Taufik,
We don't recommend using the
Loaded event of the
RadWindow control or items in it for such tasks, because it is called multiple times. This happens because the popup that hosts the
RadWindow control needs to hide and show again in order get on the top of the others. What I could suggest you is to use the
Opened event of the
RadWindow control - its is called only when the
RadWindow is actually opened.
Regards,
Miroslav Nedyalkov
the Telerik team