Start, Stop, Pause and Get Status of Services
Using the Windows API, you can easily work with Windows services. This module makes it even easier, allowing you to query status, stop, start, and pause services, on the local machine or remote computers.
Option Explicit
'API Constants
Public Const SERVICES_ACTIVE_DATABASE = "ServicesActive"
' Service Control
Public Const SERVICE_CONTROL_STOP = &H1
Public Const SERVICE_CONTROL_PAUSE = &H2
' Service State - for CurrentState
Public Const SERVICE_STOPPED = &H1
Public Const SERVICE_START_PENDING = &H2
Public Const SERVICE_STOP_PENDING = &H3
Public Const SERVICE_RUNNING = &H4
Public Const SERVICE_CONTINUE_PENDING = &H5
Public Const SERVICE_PAUSE_PENDING = &H6
Public Const SERVICE_PAUSED = &H7
'Service Control Manager object specific access types
Public Const STANDARD_RIGHTS_REQUIRED = &HF0000
Public Const SC_MANAGER_CONNECT = &H1
Public Const SC_MANAGER_CREATE_SERVICE = &H2
Public Const SC_MANAGER_ENUMERATE_SERVICE = &H4
Public Const SC_MANAGER_LOCK = &H8
Public Const SC_MANAGER_QUERY_LOCK_STATUS = &H10
Public Const SC_MANAGER_MODIFY_BOOT_CONFIG = &H20
Public Const SC_MANAGER_ALL_ACCESS = (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)
'Service object specific access types
Public Const SERVICE_QUERY_CONFIG = &H1
Public Const SERVICE_CHANGE_CONFIG = &H2
Public Const SERVICE_QUERY_STATUS = &H4
Public Const SERVICE_ENUMERATE_DEPENDENTS = &H8
Public Const SERVICE_START = &H10
Public Const SERVICE_STOP = &H20
Public Const SERVICE_PAUSE_CONTINUE = &H40
Public Const SERVICE_INTERROGATE = &H80
Public Const SERVICE_USER_DEFINED_CONTROL = &H100
Public Const SERVICE_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED Or SERVICE_QUERY_CONFIG Or SERVICE_CHANGE_CONFIG Or SERVICE_QUERY_STATUS Or SERVICE_ENUMERATE_DEPENDENTS Or SERVICE_START Or SERVICE_STOP Or SERVICE_PAUSE_CONTINUE Or SERVICE_INTERROGATE Or SERVICE_USER_DEFINED_CONTROL)
Type SERVICE_STATUS
dwServiceType As Long
dwCurrentState As Long
dwControlsAccepted As Long
dwWin32ExitCode As Long
dwServiceSpecificExitCode As Long
dwCheckPoint As Long
dwWaitHint As Long
End Type
Declare Function CloseServiceHandle Lib "advapi32.dll" (ByVal hSCObject As Long) As Long
Declare Function ControlService Lib "advapi32.dll" (ByVal hService As Long, ByVal dwControl As Long, lpServiceStatus As SERVICE_STATUS) As Long
Declare Function OpenSCManager Lib "advapi32.dll" Alias "OpenSCManagerA" (ByVal lpMachineName As String, ByVal lpDatabaseName As String, ByVal dwDesiredAccess As Long) As Long
Declare Function OpenService Lib "advapi32.dll" Alias "OpenServiceA" (ByVal hSCManager As Long, ByVal lpServiceName As String, ByVal dwDesiredAccess As Long) As Long
Declare Function QueryServiceStatus Lib "advapi32.dll" (ByVal hService As Long, lpServiceStatus As SERVICE_STATUS) As Long
Declare Function StartService Lib "advapi32.dll" Alias "StartServiceA" (ByVal hService As Long, ByVal dwNumServiceArgs As Long, ByVal lpServiceArgVectors As Long) As Long
Module
Public Function ServiceStatus(ComputerName As String, ServiceName As String) As String
Dim ServiceStat As SERVICE_STATUS
Dim hSManager As Long
Dim hService As Long
Dim hServiceStatus As Long
ServiceStatus = ""
hSManager = OpenSCManager(ComputerName, SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_ACCESS)
If hSManager <> 0 Then
hService = OpenService(hSManager, ServiceName, SERVICE_ALL_ACCESS)
If hService <> 0 Then
hServiceStatus = QueryServiceStatus(hService, ServiceStat)
If hServiceStatus <> 0 Then
Select Case ServiceStat.dwCurrentState
Case SERVICE_STOPPED
ServiceStatus = "Stopped"
Case SERVICE_START_PENDING
ServiceStatus = "Start Pending"
Case SERVICE_STOP_PENDING
ServiceStatus = "Stop Pending"
Case SERVICE_RUNNING
ServiceStatus = "Running"
Case SERVICE_CONTINUE_PENDING
ServiceStatus = "Coninue Pending"
Case SERVICE_PAUSE_PENDING
ServiceStatus = "Pause Pending"
Case SERVICE_PAUSED
ServiceStatus = "Paused"
End Select
End If
CloseServiceHandle hService
End If
CloseServiceHandle hSManager
End If
End Function
Public Sub ServicePause(ComputerName As String, ServiceName As String)
Dim ServiceStatus As SERVICE_STATUS
Dim hSManager As Long
Dim hService As Long
Dim res As Long
hSManager = OpenSCManager(ComputerName, SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_ACCESS)
If hSManager <> 0 Then
hService = OpenService(hSManager, ServiceName, SERVICE_ALL_ACCESS)
If hService <> 0 Then
res = ControlService(hService, SERVICE_CONTROL_PAUSE, ServiceStatus)
CloseServiceHandle hService
End If
CloseServiceHandle hSManager
End If
End Sub
Public Sub ServiceStart(ComputerName As String, ServiceName As String)
Dim ServiceStatus As SERVICE_STATUS
Dim hSManager As Long
Dim hService As Long
Dim res As Long
hSManager = OpenSCManager(ComputerName, SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_ACCESS)
If hSManager <> 0 Then
hService = OpenService(hSManager, ServiceName, SERVICE_ALL_ACCESS)
If hService <> 0 Then
res = StartService(hService, 0, 0)
CloseServiceHandle hService
End If
CloseServiceHandle hSManager
End If
End Sub
Public Sub ServiceStop(ComputerName As String, ServiceName As String)
Dim ServiceStatus As SERVICE_STATUS
Dim hSManager As Long
Dim hService As Long
Dim res As Long
hSManager = OpenSCManager(ComputerName, SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_ACCESS)
If hSManager <> 0 Then
hService = OpenService(hSManager, ServiceName, SERVICE_ALL_ACCESS)
If hService <> 0 Then
res = ControlService(hService, SERVICE_CONTROL_STOP, ServiceStatus)
CloseServiceHandle hService
End If
CloseServiceHandle hSManager
End If
End Sub
Usage
The first parameter is the remote computer name, if it is "" the computer is the local computer, the second is the service name.
Private Sub Command1_Click()
ServiceStop "", "Schedule"
End Sub
Private Sub Command2_Click()
ServiceStart "", "Schedule"
End Sub
Private Sub Command3_Click()
ServicePause "", "Schedule"
End Sub
Private Sub Command4_Click()
MsgBox ServiceStatus("", "Schedule")
End Sub
Special Instructions
This code originally appeared on AndreaVB.com, and has been republished here with the permission of Andrea Tincani.
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