RadWindow in UserControl

[Messias]

Good afternoon.

Are trying to run an event in instaciado RadWindow inside a usercontrol, but returns me an error: Object reference not set to an instance of an object.

what could be the cause?

[Yana]

Hello Messias,

RadWindow cannot be declared as a visual element inside a UserControl. It should be either created in code-behind as explained here or used as a UserControl as demonstrated here.

All the best,
Yana
the Telerik team