A service control program performs the following actions:
·Starts a service or driver service, if the start type is SERVICE_DEMAND_START.
·Sends control requests to a running service.
·Queries the current status of a running service.
These actions require an open handle to the service object. To obtain the handle, the service control program must:
1.Use the OpenSCManager function to obtain a handle to the SCM database on a specified machine.
2.Use the OpenService or CreateService function to obtain a handle to the service object.