Icon-ID for the command button. Will only be evaluated if the flag LLDESADDACTIONFLAG_ADD_TO_TOOLBAR is set. Use the program IconSelector.exe (in the Tools directory) to see the list of available icons with their IDs.
Platforms: Windows 10 (Version 21H2 - 23H2), Windows 11 (21H2 - 22H2), Windows Server 2016 - 2022
.NET: .NET Framework 4.8, .NET 6, .NET 7, .NET 8