sdk/samples/all in on code/Visual Studio 2008/CSInteractiveWindowsService/WTSHelper.cs

   1 /******************************** Module Header ********************************\
   2 * Module Name:  WTSHelper.cs
   3 * Project:      CSInteractiveWindowsService
   4 * Copyright (c) Microsoft Corporation.
   5 *
   6 * To be finished - Jialiang Ge
   7 * Ref: http://files.codes-sources.com/fichier.aspx?id=47023&f=WTSLib/WTSLib/WTSHelper.cs
   8 *
   9 * This source is subject to the Microsoft Public License.
  10 * See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.
  11 * All other rights reserved.
  12 *
  13 * THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
  14 * EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
  15 * WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
  16 \*******************************************************************************/
  17
  18 using System;
  19 using System.Text;
  20 using System.Runtime.InteropServices;
  21
  22
  23 namespace CSInteractiveWindowsService
  24 {
  25     class WTSHelper
  26     {
  27         /// <summary>
  28         /// Retrieves the Remote Desktop Services session that is currently
  29         /// attached to the physical console. The physical console is the monitor,
  30         /// keyboard, and mouse. If there is no session attached to the physical
  31         /// console, (for example, if the physical console session is in the
  32         /// process of being attached or detached), this function returns
  33         /// 0xFFFFFFFF.
  34         /// </summary>
  35         public static uint ActiveConsoleSessionId
  36         {
  37             get { return WTSGetActiveConsoleSessionId(); }
  38         }
  39
  40         [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
  41         private static extern uint WTSGetActiveConsoleSessionId();
  42
  43         [DllImport("wtsapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
  44         [return: MarshalAs(UnmanagedType.Bool)]
  45         private static extern bool WTSEnumerateSessions(IntPtr hServer,
  46             uint reserved, uint version, out IntPtr ppSessionInfo, out uint count);
  47
  48         [DllImport("wtsapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
  49         private static extern bool WTSQuerySessionInformation(IntPtr hServer,
  50             uint sessionId, WTS_INFO_CLASS wtsInfoClass, out IntPtr ppBuffer,
  51             out uint bytesReturned);
  52
  53         [DllImport("wtsapi32.dll", CharSet = CharSet.Auto, SetLastError = false)]
  54         private static extern void WTSFreeMemory(IntPtr memory);
  55
  56
  57         public static readonly IntPtr WTS_CURRENT_SERVER_HANDLE = IntPtr.Zero;
  58     }
  59
  60
  61     /// <summary>
  62     /// The WTS_SESSION_INFO structure contains information about a client
  63     /// session on a Remote Desktop Session Host (RD Session Host) server.
  64     /// </summary>
  65     [StructLayout(LayoutKind.Sequential)]
  66     struct WTS_SESSION_INFO
  67     {
  68         public uint SessionID;
  69
  70         [MarshalAs(UnmanagedType.LPTStr)]
  71         public string WinStationName;
  72
  73         public WTS_CONNECTSTATE_CLASS State;
  74     }
  75
  76
  77     /// <summary>
  78     /// Specifies the connection state of a Remote Desktop Services session.
  79     /// </summary>
  80     enum WTS_CONNECTSTATE_CLASS
  81     {
  82         WTSActive,
  83         WTSConnected,
  84         WTSConnectQuery,
  85         WTSShadow,
  86         WTSDisconnected,
  87         WTSIdle,
  88         WTSListen,
  89         WTSReset,
  90         WTSDown,
  91         WTSInit
  92     }
  93
  94
  95     /// <summary>
  96     /// The WTS_INFO_CLASS enumeration type contains values that indicate the
  97     /// type of session information to retrieve in a call to the
  98     /// WTSQuerySessionInformation function.
  99     /// </summary>
 100     enum WTS_INFO_CLASS
 101     {
 102         WTSInitialProgram,
 103         WTSApplicationName,
 104         WTSWorkingDirectory,
 105         WTSOEMId,
 106         WTSSessionId,
 107         WTSUserName,
 108         WTSWinStationName,
 109         WTSDomainName,
 110         WTSConnectState,
 111         WTSClientBuildNumber,
 112         WTSClientName,
 113         WTSClientDirectory,
 114         WTSClientProductId,
 115         WTSClientHardwareId,
 116         WTSClientAddress,
 117         WTSClientDisplay,
 118         WTSClientProtocolType,
 119         WTSIdleTime,
 120         WTSLogonTime,
 121         WTSIncomingBytes,
 122         WTSOutgoingBytes,
 123         WTSIncomingFrames,
 124         WTSOutgoingFrames,
 125         WTSClientInfo,
 126         WTSSessionInfo
 127     }
 128 }