@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: Enumerates services in the specified service control manager database. The name and status of each service are provided, long with additional data based on the specified information level. !!!!C# Signature: [DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)] static extern bool EnumServicesStatusEx(IntPtr hSCManager, int infoLevel, int dwServiceType, int dwServiceState, IntPtr lpServices, UInt32 cbBufSize, out uint pcbBytesNeeded, out uint lpServicesReturned, ref uint lpResumeHandle, string pszGroupName); !!!!VB Signature: TODO !!!!User-Defined Types: (see example code below). !!!!Alternative Managed API: There is no known alternative managed API as of .Net 3.5/ !!!!Notes: This works on both 32 bit and 64 bit machines. !!!!Tips & Tricks: As usual when doing pinvoke operations, watch out for 64 bit vs 32 bit and packing boundaries. !!!!Sample Code: using System; using System.Collections.Generic; using System.ComponentModel; using System.Runtime.InteropServices; using System.Security.Permissions; [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)] internal static ENUM_SERVICE_STATUS_PROCESS[] GetServices() { List<ENUM_SERVICE_STATUS_PROCESS> result = new List<ENUM_SERVICE_STATUS_PROCESS>(); IntPtr handle = IntPtr.Zero; IntPtr buf = IntPtr.Zero; try { handle = OpenSCManager(null, null, (int)ServiceControlManagerType.SC_MANAGER_ALL_ACCESS); if (handle != IntPtr.Zero) { uint iBytesNeeded = 0; uint iServicesReturned = 0; uint iResumeHandle = 0; ENUM_SERVICE_STATUS_PROCESS infoLevel = new ENUM_SERVICE_STATUS_PROCESS(); if (!EnumServicesStatusEx(handle, SC_ENUM_PROCESS_INFO, (int)ServiceType.SERVICE_WIN32, (int)ServiceStateRequest.SERVICE_STATE_ALL, IntPtr.Zero, 0, out iBytesNeeded, out iServicesReturned, ref iResumeHandle, null)) { // allocate our memory to receive the data for all the services (including the names) buf = Marshal.AllocHGlobal((int)iBytesNeeded); if (!EnumServicesStatusEx(handle, SC_ENUM_PROCESS_INFO, (int)ServiceType.SERVICE_WIN32, (int)ServiceStateRequest.SERVICE_STATE_ALL, buf, iBytesNeeded, out iBytesNeeded, out iServicesReturned, ref iResumeHandle, null)) throw new Win32Exception(Marshal.GetLastWin32Error()); ENUM_SERVICE_STATUS_PROCESS serviceStatus; // check if 64 bit system which has different pack sizes if (IntPtr.Size == 8) { long pointer = buf.ToInt64(); for (int i = 0; i < (int)iServicesReturned; i++) { serviceStatus = (ENUM_SERVICE_STATUS_PROCESS)Marshal.PtrToStructure(new IntPtr(pointer), typeof(ENUM_SERVICE_STATUS_PROCESS)); result.Add(serviceStatus); // incremement by sizeof(ENUM_SERVICE_STATUS_PROCESS) allow Packing of 8 pointer += ENUM_SERVICE_STATUS_PROCESS.SizePack8; } } else { int pointer = buf.ToInt32(); for (int i = 0; i < (int)iServicesReturned; i++) { serviceStatus = (ENUM_SERVICE_STATUS_PROCESS)Marshal.PtrToStructure(new IntPtr(pointer), typeof(ENUM_SERVICE_STATUS_PROCESS)); result.Add(serviceStatus); // incremement by sizeof(ENUM_SERVICE_STATUS_PROCESS) allow Packing of 4 pointer += ENUM_SERVICE_STATUS_PROCESS.SizePack4; } } } } } catch(Exception e) { ; } finally { if (handle != IntPtr.Zero) CloseServiceHandle(handle); if (buf != IntPtr.Zero) Marshal.FreeHGlobal(buf); } return result.ToArray(); } private const int SC_ENUM_PROCESS_INFO = 0; [DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)] private static extern bool EnumServicesStatusEx(IntPtr hSCManager, int infoLevel, int dwServiceType, int dwServiceState, IntPtr lpServices, UInt32 cbBufSize, out uint pcbBytesNeeded, out uint lpServicesReturned, ref uint lpResumeHandle, string pszGroupName); [StructLayout(LayoutKind.Sequential, Pack = 4)] internal struct ENUM_SERVICE_STATUS_PROCESS { internal static readonly int SizePack4 = Marshal.SizeOf(typeof(ENUM_SERVICE_STATUS_PROCESS)); /// <summary> /// sizeof(ENUM_SERVICE_STATUS_PROCESS) allow Packing of 8 on 64 bit machines /// </summary> internal static readonly int SizePack8 = Marshal.SizeOf(typeof(ENUM_SERVICE_STATUS_PROCESS)) + 4; [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)] internal string pServiceName; [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)] internal string pDisplayName; internal SERVICE_STATUS_PROCESS ServiceStatus; } [StructLayout(LayoutKind.Sequential)] internal struct SERVICE_STATUS_PROCESS { public int serviceType; public int currentState; public int controlsAccepted; public int win32ExitCode; public int serviceSpecificExitCode; public int checkPoint; public int waitHint; public int processId; public int serviceFlags; } private enum ServiceType { SERVICE_KERNEL_DRIVER = 0x1, SERVICE_FILE_SYSTEM_DRIVER = 0x2, SERVICE_WIN32_OWN_PROCESS = 0x10, SERVICE_WIN32_SHARE_PROCESS = 0x20, SERVICE_INTERACTIVE_PROCESS = 0x100, SERVICETYPE_NO_CHANGE = SERVICE_NO_CHANGE, SERVICE_WIN32 = (SERVICE_WIN32_OWN_PROCESS | SERVICE_WIN32_SHARE_PROCESS) } private enum ServiceStateRequest { SERVICE_ACTIVE = 0x1, SERVICE_INACTIVE = 0x2, SERVICE_STATE_ALL = (SERVICE_ACTIVE | SERVICE_INACTIVE) } private enum ServiceControlManagerType { SC_MANAGER_CONNECT = 0x1, SC_MANAGER_CREATE_SERVICE = 0x2, SC_MANAGER_ENUMERATE_SERVICE = 0x4, SC_MANAGER_LOCK = 0x8, SC_MANAGER_QUERY_LOCK_STATUS = 0x10, SC_MANAGER_MODIFY_BOOT_CONFIG = 0x20, SC_MANAGER_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SC_MANAGER_CONNECT | SC_MANAGER_CREATE_SERVICE | SC_MANAGER_ENUMERATE_SERVICE | SC_MANAGER_LOCK | SC_MANAGER_QUERY_LOCK_STATUS | SC_MANAGER_MODIFY_BOOT_CONFIG } Documentation: EnumServicesStatusEx@msdn on MSDN
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