You can use the marquee style when you need to indicate progress is being made, but you cannot indicate the quantity of progress. The Marquee style is valid only when visual styles are enabled. The Continuous style is valid only when visual styles are not enabled.
Windows XP Home Edition, Windows XP Professional x64 Edition, Windows Server 2003 Platform Note: The Marquee style is supported only on these platforms.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)