Setting this to True, will cause the button to be selected on the first click, and the second click will unselect the button. When set to False, a button will only stay selected while the mouse button is pressed down.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2