判断windows操作系统是否安装.net及MDAC等组件的引导程序，可用于自定义基于windows installer的安装程序使用，可最大程序自定义安装引导程序，从而取代VS自带的安装引导工具，且具有极大的灵活性和可扩充性。-To determine whether the installation of windows operating system. Net and MDAC components, such as guided procedures, can be used to customize the installation of windows installer based on the procedures used, the procedure can be the biggest custom installation guide procedures, and thus replace the VS built-in installation guide tool, and has great deal of flexibility and scalability.