C# Signature:
[DllImport("advapi32.dll", SetLastError=true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool ControlService( IntPtr hService,
SERVICE_CONTROL dwControl,
ref SERVICE_STATUS lpServiceStatus
);
VB Signature:
Declare Function ControlService Lib "advapi32.dll" (ByVal hService As Long, ByVal lControlCode As Long, ByVal lpServiceStatus As SERVICE_STATUS) As Boolean
C# User-Defined Types:
See SERVICE_STATUS definition
[Flags]
public enum SERVICE_CONTROL : uint
{
STOP = 0x00000001,
PAUSE = 0x00000002,
CONTINUE = 0x00000003,
INTERROGATE = 0x00000004,
SHUTDOWN = 0x00000005,
PARAMCHANGE = 0x00000006,
NETBINDADD = 0x00000007,
NETBINDREMOVE = 0x00000008,
NETBINDENABLE = 0x00000009,
NETBINDDISABLE = 0x0000000A,
DEVICEEVENT = 0x0000000B,
HARDWAREPROFILECHANGE = 0x0000000C,
POWEREVENT = 0x0000000D,
SESSIONCHANGE = 0x0000000E
}
public enum SERVICE_STATE : uint
{
SERVICE_STOPPED = 0x00000001,
SERVICE_START_PENDING = 0x00000002,
SERVICE_STOP_PENDING = 0x00000003,
SERVICE_RUNNING = 0x00000004,
SERVICE_CONTINUE_PENDING = 0x00000005,
SERVICE_PAUSE_PENDING = 0x00000006,
SERVICE_PAUSED = 0x00000007
}
[Flags]
public enum SERVICE_ACCEPT : uint
{
STOP = 0x00000001,
PAUSE_CONTINUE = 0x00000002,
SHUTDOWN = 0x00000004,
PARAMCHANGE = 0x00000008,
NETBINDCHANGE = 0x00000010,
HARDWAREPROFILECHANGE = 0x00000020,
POWEREVENT = 0x00000040,
SESSIONCHANGE = 0x00000080,
}
VB User-Defined Types:
See SERVICE_STATUS definition
Public Enum SERVICE_CONTROL As Integer
[STOP] = &H1
PAUSE = &H2
CONTINUE = &H3
INTERROGATE = &H4
SHUTDOWN = &H5
PARAMCHANGE = &H6
NETBINDADD = &H7
NETBINDREMOVE = &H8
NETBINDENABLE = &H9
NETBINDDISABLE = &HA
DEVICEEVENT = &HB
HARDWAREPROFILECHANGE = &HC
POWEREVENT = &HD
SESSIONCHANGE = &HE
End Enum
Public Enum SERVICE_STATE As Integer
SERVICE_STOPPED = &H1
SERVICE_START_PENDING = &H2
SERVICE_STOP_PENDING = &H3
SERVICE_RUNNING = &H4
SERVICE_CONTINUE_PENDING = &H5
SERVICE_PAUSE_PENDING = &H6
SERVICE_PAUSED = &H7
End Enum
Public Enum SERVICE_ACCEPT As Integer
[STOP] = &H1
PAUSE_CONTINUE = &H2
SHUTDOWN = &H4
PARAMCHANGE = &H8
NETBINDCHANGE = &H10
HARDWAREPROFILECHANGE = &H20
POWEREVENT = &H40
SESSIONCHANGE = &H80
End Enum
Notes:
None.
Tips & Tricks:
Sample Code:
C#
IntPtr con = Tools.OpenSCManager("\\\\compname", null, (uint)SCM_ACCESS.SC_MANAGER_ALL_ACCESS);
IntPtr serv = Tools.OpenService(con, "ServiceTest", (uint)SERVICE_ACCESS.SERVICE_ALL_ACCESS);
SERVICE_STATUS stat = new SERVICE_STATUS();
bool res = Tools.ControlService(m_serv, SERVICE_CONTROL.STOP, ref stat);
Console.WriteLine("Stop service result: " + res);
// TODO: Code to halt execution until the service has finally stopped, to continue another task afterwards.
Alternative Managed API:
C#
using System;
using System.Runtime.InteropServices;
using System.Reflection;
using System.ServiceProcess;
using System.Threading;
namespace ServiceHelper
{
/// <summary>
/// Helper class for service control.
/// </summary>
public class ServiceControl : IDisposable
{
private int WAIT_TIMEOUT = 0x00000102;
private IntPtr serviceControlManagerHandle;
private IntPtr serviceHandle;
private IntPtr statusHandle;
private Thread heardbeatThread;
private ManualResetEvent heardbeatStopped;
private ManualResetEvent heardbeatActive;
private ManualResetEvent terminationPending;
private uint waitHintMilliseconds;
private int heardbeatMilliseconds;
public ServiceControl (ServiceBase aServiceBase, uint aWaitHintMilliseconds, int aHeardbeatMilliseconds)
{
FieldInfo fieldInfo;
BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.NonPublic;
SERVICE_STATUS serviceStatus;
serviceControlManagerHandle = Interop.OpenSCManager (
null,
null,
(uint) SCM_ACCESS.SC_MANAGER_ALL_ACCESS);
if (serviceControlManagerHandle == IntPtr.Zero)
{
throw new Exception (aServiceBase.ServiceName);
}
serviceHandle = Interop.OpenService (
serviceControlManagerHandle,
aServiceBase.ServiceName,
(uint) SERVICE_ACCESS.SERVICE_ALL_ACCESS);
if (serviceHandle == IntPtr.Zero)
{
throw new Exception ("aServiceName");
}
fieldInfo = typeof (System.ServiceProcess.ServiceBase).GetField ("statusHandle", bindingFlags);
statusHandle = (IntPtr) (fieldInfo.GetValue (aServiceBase));
if (statusHandle == IntPtr.Zero)
throw new Exception ("statusHandle is not valid.");
waitHintMilliseconds = aWaitHintMilliseconds;
heardbeatMilliseconds = aHeardbeatMilliseconds;
serviceStatus = new SERVICE_STATUS ();
Interop.QueryServiceStatus (serviceHandle, ref serviceStatus);
serviceStatus.WaitHint = waitHintMilliseconds;
Interop.SetServiceStatus (statusHandle, ref serviceStatus);
terminationPending = new ManualResetEvent (false);
heardbeatStopped = new ManualResetEvent (true);
heardbeatActive = new ManualResetEvent (false);
heardbeatThread = new Thread (IncrementHeartbeat);
heardbeatThread.SetApartmentState (ApartmentState.MTA);
heardbeatThread.Name = "Heardbeat_$" + Guid.NewGuid ().ToString ().Replace ('-', '_');
heardbeatThread.Start ();
}
private SERVICE_STATUS DoQueryServiceStatus ()
{
SERVICE_STATUS serviceStatus = new SERVICE_STATUS();
Interop.QueryServiceStatus (serviceHandle, ref serviceStatus);
return serviceStatus;
}
public void StopHeardbeat ()
{
heardbeatActive.Reset ();
heardbeatStopped.Set ();
}
public void StartHeardbeat ()
{
heardbeatStopped.Reset ();
heardbeatActive.Set ();
}
private void IncrementHeartbeat ()
{
bool terminating = false;
WaitHandle[] dispatchHandles = new WaitHandle[] { heardbeatStopped, heardbeatActive, terminationPending };
WaitHandle[] activeHeardbeatHandles = new WaitHandle[] { heardbeatStopped, terminationPending };
WaitHandle[] inactiveHeardbeatHandles = new WaitHandle[] { heardbeatActive, terminationPending };
while (!terminating)
{
switch (WaitHandle.WaitAny (dispatchHandles))
{
case 0:
WaitHandle.WaitAny (inactiveHeardbeatHandles);
break;
case 1:
if (WaitHandle.WaitAny (activeHeardbeatHandles, heardbeatMilliseconds, false) == WAIT_TIMEOUT)
{
SERVICE_STATUS serviceStatus = new SERVICE_STATUS ();
Interop.QueryServiceStatus (serviceHandle, ref serviceStatus);
serviceStatus.CheckPoint++;
Interop.SetServiceStatus (statusHandle, ref serviceStatus);
}
break;
case 2:
terminating = true;
heardbeatStopped.Set ();
break;
}
}
}
private void DoControlService (SERVICE_CONTROL aServiceControl)
{
SERVICE_STATUS serviceStatus = new SERVICE_STATUS();
if (!Interop.ControlService(serviceHandle, aServiceControl, ref serviceStatus))
{
throw new Exception (serviceStatus.ToString ());
}
}
public void Dispose()
{
heardbeatActive.Reset ();
heardbeatStopped.Reset ();
terminationPending.Set ();
heardbeatStopped.WaitOne ();
Interop.CloseServiceHandle (serviceHandle);
Interop.CloseServiceHandle (serviceControlManagerHandle);
}
}
public class TestService : ServiceBase
{
ServiceControl serviceControl;
public static void Main ()
{
ServiceBase.Run (new TestService());
}
public TestService()
{
InitializeComponent ();
}
protected override void OnPause ()
{
serviceControl = new ServiceControl (this, 60000, 10000);
serviceControl.StartHeardbeat ();
//TODO: Add pause code here ...
serviceControl.StopHeardbeat ();
}
private void InitializeComponent()
{
this.CanPauseAndContinue = true;
this.ServiceName = "TestService";
}
protected override void OnStop()
{
serviceControl = new ServiceControl (this, 60000, 10000);
serviceControl.StartHeardbeat ();
//TODO: Add stop code here ...
serviceControl.StopHeardbeat ();
}
}
internal class Interop
{
[DllImport ("advapi32.dll", SetLastError = true)]
[return: MarshalAs (UnmanagedType.Bool)]
internal static extern bool ControlService (
IntPtr hService,
SERVICE_CONTROL dwControl,
ref SERVICE_STATUS lpServiceStatus);
[DllImport ("advapi32.dll", EntryPoint = "OpenSCManagerW", ExactSpelling = true, CharSet = CharSet.Unicode, SetLastError = true)]
internal static extern IntPtr OpenSCManager (
string machineName,
string databaseName,
uint dwAccess);
[DllImport ("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
internal static extern IntPtr OpenService (IntPtr hSCManager, string lpServiceName, uint dwDesiredAccess);
[DllImport ("advapi32.dll", SetLastError = true)]
[return: MarshalAs (UnmanagedType.Bool)]
internal static extern bool CloseServiceHandle (IntPtr hSCObject);
[DllImport ("advapi32.dll", EntryPoint = "QueryServiceStatus", CharSet = CharSet.Auto)]
internal static extern bool QueryServiceStatus (IntPtr hService, ref SERVICE_STATUS dwServiceStatus);
[DllImport ("advapi32.dll")]
internal static extern bool SetServiceStatus (IntPtr hServiceStatus, ref SERVICE_STATUS lpServiceStatus);
}
}
