https://learn.microsoft.com/en-us/dotnet/api/microsoft.visualstudio.shell.interop.ivsuishell?view=visualstudiosdk-2022
IVsUIShell Interface (Microsoft.VisualStudio.Shell.Interop) | Microsoft Learn
This interface provides access to basic windowing functionality, including access to and creation of tool windows and document windows.
interfacemicrosoftvisualstudioshellinterop