NMenuSplitButtonCommandSource Class
A command source that can be applied to NMenuSplitButton instances. Besides to the SelectedIndexChanged and menu item click it also uses the NMenuSplitButton.Click event to execute the command with the index of the currently selected menu item.
Target Platforms: Windows 11, Windows 10, Windows 7, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later)