ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Core.Events Namespace / ProjectWindowSelectedItemsChangedEventArgs Class / WindowID Property

WindowID Property
Gets the DAML id of the IProjectWindow
Syntax
public string WindowID {get;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.1 or higher.
See Also