InstallShield包含300多个内部库函数，用户可在安装脚本中调用它们来创建程序组，操作文件夹，处理目录，监督安装状态，创建对话框，操作文件及其它更多工作(InstallShield contains more than 300 internal library functions. Users can invoke them in installation scr ipts to create program groups, manipulate folders, process directories, monitor installation status, create dialog boxes, manipulate files and do more work.)