June 2nd, 2006
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Except to set the dependency of services in SCM(Service Control Manager). You have another way to make sure some services can run before your application (serivce).
Use StartService to start a Window Service
Please note as follow:
- If the service already start, it will return FALSE.
- The function will return if the Windows Service is in running status (maybe needs 30sec atmost) or failed.
For more detail, please refer MSDN. Refer the sample code.
SC_HANDLE serviceControlManager = OpenSCManager(0, 0, SC_MANAGER_CONNECT); SC_HANDLE service; > > if (serviceControlManager) { service = OpenService(serviceControlManager, "SERVICE_NAME", SERVICE_START | SERVICE_QUERY_STATUS | DELETE); // Make sure you have the privilege of SERVICE_START. > > if (service) { if (StartService(service, 0, NULL)) { // Services already startup successes. } else { DWORD dwLastError = GetLastError(); if (dwLastError == ERROR_SERVICE_ALREADY_RUNNING) { //Services already started } else { //Service can not start. hr = E_FAIL; return; } } } > >
Use ControlService to stop Windows Services
You may think it may have a function StopService to stop serivce. Unfortunately, you have use CotrolService to do that. Please refer the sample code for more detail.
SC_HANDLE serviceControlManager = OpenSCManager(0, 0, SC_MANAGER_CONNECT); SC_HANDLE service; > > if (serviceControlManager) { service = OpenService(serviceControlManager, "SERVICE_NAME", SERVICE_STOP | SERVICE_QUERY_STATUS | DELETE); // Make sure you have the privilege of SERVICE_STOP. > > if (service) { SERVICE_STATUS serviceStatus; QueryServiceStatus( service, &serviceStatus ); > > if (serviceStatus.dwCurrentState != SERVICE_STOPPED) { if (! ControlService(service, // handle to service SERVICE_CONTROL_STOP, // control value to send &serviceStatus) ) // address of status info { // ControlService failed } } } } > >