Check if a services is installed using C

Question

I\'m writing a C application which creates a Windows service. I\'d like to check if the service is installed before trying to call the installation function, but I can\'t manage

Answer 1

If you need a yes / no answer whether a service is installed or note, use the following function:

bool IsServiceInstalled(LPWSTR ServiceName)
{
    bool serviceInstalled = false;
    SC_HANDLE scm_handle = OpenSCManager(0, 0, SC_MANAGER_CONNECT);
    if (scm_handle)
    {
        SC_HANDLE service_handle = OpenService(scm_handle, ServiceName, SERVICE_INTERROGATE);
        if (service_handle != NULL)
        {
            wprintf(L"Service  Installed\n");
            serviceInstalled = true;
            CloseServiceHandle(service_handle);
        }
        else
        {
            wprintf(_T("OpenService failed - service not installed\n"));
        }
        CloseServiceHandle(scm_handle);
    }
    else
        wprintf(_T("OpenService couldn't open - service not installed\n"));

    return serviceInstalled;

}