https://learn.microsoft.com/es-es/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.dependencyproperty.registerattached?view=windows-app-sdk-2.0-experimental
DependencyProperty.RegisterAttached Method (Microsoft.UI.Xaml) - Windows App SDK | Microsoft Learn
Registers an attached dependency property with the specified property name, property type, owner type, and property metadata for the property.
windows appmethodmicrosoftuixaml