Constants for use with the OpenSCManager API call

To open service you don't need to use Windows API (OpenSCManager() and OpenService()) use field of System.ServiceProcess.ServiceController class (ServiceController.ServiceHandle.DangerousGetHandle())

        scHandle = OpenSCManager(null, null, (uint)SCM_ACCESS.SC_MANAGER_ALL_ACCESS);

To open service you don't need to use Windows API (OpenSCManager() and OpenService()) use field of System.ServiceProcess.ServiceController class (ServiceController.ServiceHandle.DangerousGetHandle())

        scHandle = OpenSCManager(null, null, (uint)SCM_ACCESS.SC_MANAGER_ALL_ACCESS);

IntPtr con = Tools.OpenSCManager("\\\\compname", null, (uint)SCM_ACCESS.SC_MANAGER_ALL_ACCESS);

         serviceControlManagerHandle = Interop.OpenSCManager (

     [DllImport ("advapi32.dll", EntryPoint = "OpenSCManagerW", ExactSpelling = true, CharSet = CharSet.Unicode, SetLastError = true)]

     internal static extern IntPtr OpenSCManager (

Dim scHandle As IntPtr = OpenSCManager(Nothing, Nothing, SC_MANAGER_ALL_ACCESS)

        #region OpenSCManager

        [DllImport("advapi32.dll", EntryPoint="OpenSCManagerW", ExactSpelling=true, CharSet=CharSet.Unicode, SetLastError=true)]

        static extern IntPtr OpenSCManager( string machineName, string databaseName, SCM_ACCESS dwDesiredAccess );

                IntPtr schSCManager = OpenSCManager( null, null, SCM_ACCESS.SC_MANAGER_ALL_ACCESS);

SERVICE_STATES, SERVICE_TYPES, ENUM_SERVICE_STATUS, OpenSCManager, EnumServicesStatus, and OpenService

IntPtr handle = OpenSCManager( null, null, SCM_ACCESS.SC_MANAGER_ALL_ACCESS );

        handle = OpenSCManager(null, null, (int)ServiceControlManagerType.SC_MANAGER_ALL_ACCESS);

     serviceControlManager = OpenSCManager(null, null, SC_MANAGER_ALL_ACCESS);

    [DllImport("advapi32.dll", EntryPoint="OpenSCManagerW", ExactSpelling=true, CharSet=CharSet.Unicode, SetLastError=true)]

    public static extern IntPtr OpenSCManager(string machineName, string databaseName, uint dwAccess);

    Private Shared Function OpenSCManager(ByVal machineName As String, ByVal databaseName As String, ByVal desiredAccess As Int32) As IntPtr

    Declare Function OpenSCManager Lib "advapi32.dll" Alias "OpenSCManagerA" (ByVal lpMachineName As String, ByVal lpDatabaseName As String, ByVal dwDesiredAccess As Integer) As Integer

    Dim scHandle As IntPtr = OpenSCManager(Nothing, Nothing, SC_MANAGER_ALL_ACCESS )

    IntPtr handle = OpenSCManager( null, null, (uint)SCM_ACCESS.SC_MANAGER_ALL_ACCESS );

        IntPtr databaseHandle = OpenSCManager( null, null, SC_MANAGER_ALL_ACCESS );

            throw new System.Runtime.InteropServices.ExternalException( "Error OpenSCManager\n" );

    public static extern IntPtr OpenSCManager( String lpMachineName, String lpDatabaseName, UInt32 dwDesiredAccess );

        IntPtr databaseHandle = OpenSCManager( null, null, SC_MANAGER_ALL_ACCESS );

            throw new System.Runtime.InteropServices.ExternalException( "Error OpenSCManager\n" );

    public static extern IntPtr OpenSCManager( String lpMachineName, String lpDatabaseName, UInt32 dwDesiredAccess );

    Dim hSCManager As IntPtr = New IntPtr(OpenSCManager(Nothing, Nothing, SCMAccess.SC_MANAGER_ALL_ACCESS))

see OpenSCManager