C# Signature:

    [DllImport("advapi32.dll", EntryPoint="OpenSCManagerW", ExactSpelling=true, CharSet=CharSet.Unicode, SetLastError=true)]
    public static extern IntPtr OpenSCManager( string machineName, string databaseName, uint dwAccess );

VB Signature:

    <DllImport("advapi32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _
    Private Shared Function OpenSCManager(ByVal machineName As String, ByVal databaseName As String, ByVal desiredAccess As Int32) As IntPtr
    End Function

VB .NET Signature:

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

User-Defined Types:

None.

Notes:

Tips & Tricks:

Pass in Null/Nothing for MachineName to use the local machine.

Pass in Null/nothing as the database name to use the default SERVICES_ACTIVE_DATABASE

Sample Code:

VB:
Const STANDARD_RIGHTS_REQUIRED As Int32 = &HF0000

    Const SC_MANAGER_CONNECT As Int32 = &H1
    Const SC_MANAGER_CREATE_SERVICE As Int32 = &H2
    Const SC_MANAGER_ENUMERATE_SERVICE As Int32 = &H4
    Const SC_MANAGER_LOCK As Int32 = &H8
    Const SC_MANAGER_QUERY_LOCK_STATUS As Int32 = &H10
    Const SC_MANAGER_MODIFY_BOOT_CONFIG As Int32 = &H20

    Const SC_MANAGER_ALL_ACCESS As Int32 = STANDARD_RIGHTS_REQUIRED Or _
                        SC_MANAGER_CONNECT Or _
                        SC_MANAGER_CREATE_SERVICE Or _
                        SC_MANAGER_ENUMERATE_SERVICE Or _
                        SC_MANAGER_LOCK Or _
                        SC_MANAGER_QUERY_LOCK_STATUS Or _
                        SC_MANAGER_MODIFY_BOOT_CONFIG

    Dim scHandle As IntPtr = OpenSCManager(Nothing, Nothing, SC_MANAGER_ALL_ACCESS )
    MsgBox(scHandle.ToString)
    CloseServiceHandle(scHandle)
C#:
    IntPtr handle = OpenSCManager( null, null, SCM_ACCESS.SC_MANAGER_ALL_ACCESS );
    if ( handle != IntPtr.Zero )
    {
        CloseServiceHandle( handle );
    }

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