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Visual Basic / NT Samples / Is Service Is Running

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Added: 2002-08-19

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How to find out if a Service Is Running

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Snippet By: Dean Cleaver

Snippet By:	Dean Cleaver
Declarations
Highlight All' Service database names Public Const SERVICES_ACTIVE_DATABASE = "ServicesActive" ' 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) ' 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 Public 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 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
Code
Highlight All' ' Here's where we test if the service is running ' Dim lhSCManager As Long Dim lhService As Long Dim lhServiceStatus As Long lhSCManager = OpenSCManager("Computer Name", SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_ACCESS) If lhSCManager <> 0 Then lhService = OpenService(lhSCManager, "Service Name", SERVICE_ALL_ACCESS) If lhService <> 0 Then lhServiceStatus = QueryServiceStatus(lhService, ServiceStatus) If lhServiceStatus <> 0 Then Select Case ServiceStatus.dwCurrentState Case SERVICE_STOPPED Case SERVICE_START_PENDING Case SERVICE_STOP_PENDING Case SERVICE_RUNNING Case SERVICE_CONTINUE_PENDING Case SERVICE_PAUSE_PENDING Case SERVICE_PAUSED End Select CloseServiceHandle lhServiceStatus End If CloseServiceHandle lhService End If CloseServiceHandle lhSCManager End If

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