WMI, ExplorerOM
Use EOMAdmin to enlist and start the orchestration since WMIAdmin is notorious for intermittent failures during enlistment.
http://msdn.microsoft.com/en-us/library/aa560467.aspx
http://msdn.microsoft.com/zh-cn/library/aa560904(v=BTS.10).aspx
http://msdn.microsoft.com/en-us/library/aa560066(v=BTS.70).aspx
http://msdn.microsoft.com/en-us/library/aa578166(msdn.10).aspx