C# 调用API，实现注销远程登录本机的用户

using System;
using System.Management;
using System.Runtime;
using System.Runtime.InteropServices;
using System.Text;

namespace TSConsoleApplication
{
/**/
/// <summary>
/// VS2005专业教程网收集整理，http://www.vs2005.com/
/// </summary>
public class TSControl
{
/**/
/// <summary>
/// Terminal Services API Functions,The WTSEnumerateSessions function retrieves a list of sessions on a specified terminal server,
/// </summary>
/// <param name="hServer">[in] Handle to a terminal server. Specify a handle opened by the WTSOpenServer function, or specify WTS_CURRENT_SERVER_HANDLE to indicate the terminal server on which your application is running</param>
/// <param name="Reserved">Reserved; must be zero</param>
/// <param name="Version">[in] Specifies the version of the enumeration request. Must be 1. </param>
/// <param name="ppSessionInfo">[out] Pointer to a variable that receives a pointer to an array of WTS_SESSION_INFO structures. Each structure in the array contains information about a session on the specified terminal server. To free the returned buffer, call the WTSFreeMemory function.
/// To be able to enumerate a session, you need to have the Query Information permission.</param>
/// <param name="pCount">[out] Pointer to the variable that receives the number of WTS_SESSION_INFO structures returned in the ppSessionInfo buffer. </param>
/// <returns>If the function succeeds, the return value is a nonzero value. If the function fails, the return value is zero</returns>
[DllImport("wtsapi32", CharSet = CharSet.Auto, SetLastError = true)]
private static extern bool WTSEnumerateSessions(int hServer, int Reserved, int Version, ref long ppSessionInfo, ref int pCount);

/**/
/// <summary>
/// Terminal Services API Functions,The WTSFreeMemory function frees memory allocated by a Terminal Services function.
/// </summary>
/// <param name="pMemory">[in] Pointer to the memory to free</param>
[DllImport("wtsapi32.dll")]
public static extern void WTSFreeMemory(System.IntPtr pMemory);

/**/
/// <summary>
/// Terminal Services API Functions,The WTSLogoffSession function logs off a specified Terminal Services session.
/// </summary>
/// <param name="hServer">[in] Handle to a terminal server. Specify a handle opened by the WTSOpenServer function, or specify WTS_CURRENT_SERVER_HANDLE to indicate the terminal server on which your application is running. </param>
/// <param name="SessionId">[in] A Terminal Services session identifier. To indicate the current session, specify WTS_CURRENT_SESSION. You can use the WTSEnumerateSessions function to retrieve the identifiers of all sessions on a specified terminal server.
/// To be able to log off another user's session, you need to have the Reset permission </param>
/// <param name="bWait">[in] Indicates whether the operation is synchronous.
/// If bWait is TRUE, the function returns when the session is logged off.
/// If bWait is FALSE, the function returns immediately.</param>
/// <returns>If the function succeeds, the return value is a nonzero value.
/// If the function fails, the return value is zero.</returns>
[DllImport("wtsapi32.dll")]
public static extern bool WTSLogoffSession(int hServer, long SessionId, bool bWait);
[DllImport("Wtsapi32.dll")]
public static extern bool WTSQuerySessionInformation(
System.IntPtr hServer, int sessionId, WTSInfoClass wtsInfoClass, out StringBuilder ppBuffer, out int pBytesReturned);

public enum WTSInfoClass
{
WTSInitialProgram,
WTSApplicationName,
WTSWorkingDirectory,
WTSOEMId,
WTSSessionId,
WTSUserName,
WTSWinStationName,
WTSDomainName,
WTSConnectState,
WTSClientBuildNumber,
WTSClientName,
WTSClientDirectory,
WTSClientProductId,
WTSClientHardwareId,
WTSClientAddress,
WTSClientDisplay,
WTSClientProtocolType
}

/**/
/// <summary>
/// The WTS_CONNECTSTATE_CLASS enumeration type contains INT values that indicate the connection state of a Terminal Services session.
/// </summary>
public enum WTS_CONNECTSTATE_CLASS
{
WTSActive,
WTSConnected,
WTSConnectQuery,
WTSShadow,
WTSDisconnected,
WTSIdle,
WTSListen,
WTSReset,
WTSDown,
WTSInit,
}

/**/
/// <summary>
/// The WTS_SESSION_INFO structure contains information about a client session on a terminal server.
/// if the WTS_SESSION_INFO.SessionID==0, it means that the SESSION is the local logon user's session.
/// </summary>
public struct WTS_SESSION_INFO
{
public int SessionID;
[MarshalAs(UnmanagedType.LPTStr)]
public string pWinStationName;
public WTS_CONNECTSTATE_CLASS state;
}

/**/
/// <summary>
/// The SessionEnumeration function retrieves a list of WTS_SESSION_INFO on a current terminal server.
/// </summary>
/// <returns>a list of WTS_SESSION_INFO on a current terminal server</returns>
public static WTS_SESSION_INFO[] SessionEnumeration()
{
//Set handle of terminal server as the current terminal server
int hServer = 0;
bool RetVal;
long lpBuffer = 0;
int Count = 0;
long p;
WTS_SESSION_INFO Session_Info = new WTS_SESSION_INFO();
WTS_SESSION_INFO[] arrSessionInfo;
RetVal = WTSEnumerateSessions(hServer, 0, 1, ref lpBuffer, ref Count);
arrSessionInfo = new WTS_SESSION_INFO[0];
if (RetVal)
{
arrSessionInfo = new WTS_SESSION_INFO[Count];
int i;
p = lpBuffer;
for (i = 0; i < Count; i++)
{
arrSessionInfo[i] = (WTS_SESSION_INFO)Marshal.PtrToStructure(new IntPtr(p), Session_Info.GetType());
p += Marshal.SizeOf(Session_Info.GetType());
}
WTSFreeMemory(new IntPtr(lpBuffer));
}
else
{
//Insert Error Reaction Here
}
return arrSessionInfo;
}

public TSControl()
{
//
// TODO: 在此处添加构造函数逻辑
//

}
}

/**/
/// <summary>
/// Class1 的摘要说明。
/// </summary>
class Class1
{
/**/
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main(string[] args)
{
//
// TODO: 在此处添加代码以启动应用程序
//
TSControl.WTS_SESSION_INFO[] pSessionInfo = TSControl.SessionEnumeration();

for (int i = 0; i < pSessionInfo.Length; i++)
{
if (pSessionInfo[i].SessionID != 0)
{
try
{
int count = 0;
IntPtr buffer = IntPtr.Zero;
StringBuilder sb = new StringBuilder();

bool bsuccess = TSControl.WTSQuerySessionInformation(IntPtr.Zero, pSessionInfo[i].SessionID, TSControl.WTSInfoClass.WTSUserName, out sb, out count);
if (bsuccess)
{
//如果用户名为Administrator，则注销它。您可以通过改变Administrator注销其它的用户
if (sb.ToString().Trim() == "Administrator")
{
while (TSControl.WTSLogoffSession(0, pSessionInfo[i].SessionID, true))
{
System.Threading.Thread.Sleep(3000);
}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
Console.ReadLine();
}
}
}