Service Startup - Win32 Programmer's Reference

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Service Startup

To start a service or driver service, the service control program uses the StartService function. The StartService function fails if the database is locked. If this occurs, the service control program should wait a few seconds and call StartService again. It can check the current lock status of the database by calling the QueryServiceLockStatus function.

If the service control program is starting a service, it can use the StartService function to specify an array of arguments to be passed to the service's ServiceMain function. The StartService function returns after a new thread has been created to execute the ServiceMain function. The service control program can retrieve the status of the newly started service in a SERVICE_STATUS structure by calling the QueryServiceStatus function. During initialization, the dwCurrentState member should be SERVICE_START_PENDING. The dwWaitHint member is a time interval, in milliseconds, that indicates how long the service control program should wait before calling QueryServiceStatus again. When the initialization is complete, the service changes dwCurrentState to SERVICE_RUNNING.

If the program is starting a driver service, StartService returns after the device driver has completed its initialization.

For more information, see Starting a Service.

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