This library was written for version 4.71 or later of comctl32.dll. If you have an older version, you can download the latest version from the Microsoft site. Follow this link if you have an older version of comctl32.dll <http://www.microsoft.com/msdn/downloads/files/40Comupd.htm>. It is important to note that the library will not load if your comctl32.dll version is older than 4.71.