谁能帮我翻译一段C++到C#？调用wtsapi和非托管结构的传递和获取的问题。

Question

一下是C++源代码

// LogonUserList.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include<Windows.h>
#include<string.h>
#include<WtsApi32.h>
#include<iostream>
#pragma comment(lib, "wtsapi32.lib")

using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	DWORD count = 0;
	PWTS_SESSION_INFOW plBuffer = 0;
	long p = 0;

	bool success = WTSEnumerateSessions(0, 0, 1, &plBuffer, &count);
	WTS_SESSION_INFO * info =(WTS_SESSION_INFO *)malloc(sizeof(WTS_SESSION_INFO) * count);
	for (int i = 0; i < count; i++)
	{
		info[i] = plBuffer[i];
	}
	LPTSTR pData;
	for (int i = 0; i < count; i++)
	{
		DWORD reted = 0;
		bool ret = WTSQuerySessionInformation(0, info[i].SessionId, WTSClientAddress, &pData, &reted);
		if(ret)
		{
			PWTS_CLIENT_ADDRESS pWTSCA = (PWTS_CLIENT_ADDRESS)pData;

			char address[100]= {0};
			sprintf(address, "address:%d.%d.%d.%d",pWTSCA->Address[2],pWTSCA->Address[3],pWTSCA->Address[4],pWTSCA->Address[5]);
			printf("%s\r\n", address);
			printf("%d\r\n", pWTSCA->AddressFamily);

			printf("\r\n");
		}
	}
	printf("\r\n");
	free(info);
}

其他的我都实现了，就是有一句WTSQuerySessionInformation函数我无法再C#里面实现，其中传入的&pData我不知道在C#里面怎么获取，pData在之后转换成PWTS_CLIENT_ADDRESS类型，之后获取里面的一个地址信息。在C#里面我就不知道怎么做了。

一下是我C#代码，其中都实现了，就差获取ClientAddress这个功能了。

        public static List<LogonUser> GetLogonUserList()
        {
            List<LogonUser> LogonUsers = null;
            #region 查询代码
            WTS_SESSION_INFO[] pSessionInfo = TSControl.SessionEnumeration();
            LogonUser cum = null;
            LogonUsers = new System.Collections.Generic.List<LogonUser>();
            for (int i = 0; i < pSessionInfo.Length; i++)
            {
                if ("RDP-Tcp" != pSessionInfo[i].pWinStationName)
                {
                    try
                    {
                        int count = 0;
                        IntPtr buffer = IntPtr.Zero;
                        StringBuilder userName = new StringBuilder();
                        StringBuilder clientUser = new StringBuilder();
                        StringBuilder stateType = new StringBuilder();
                        byte[] protocalType = new byte[2];
                        byte[] connState = new byte[1];
                        StringBuilder clientAddress = new StringBuilder();

                        bool userNameBool = TSControl.WTSQuerySessionInformation(IntPtr.Zero, pSessionInfo[i].SessionID, WTSInfoClass.WTSUserName, out userName, out count);
                        bool clientUserBool = TSControl.WTSQuerySessionInformation(IntPtr.Zero, pSessionInfo[i].SessionID, WTSInfoClass.WTSClientName, out clientUser, out count);
                        bool stateTypeBool = TSControl.WTSQuerySessionInformation(IntPtr.Zero, pSessionInfo[i].SessionID, WTSInfoClass.WTSWinStationName, out stateType, out count);
                        bool protocalTypeBool = TSControl.WTSQuerySessionInformation(IntPtr.Zero, pSessionInfo[i].SessionID, WTSInfoClass.WTSClientProtocolType, out protocalType, out count);
                        bool connStateBool = TSControl.WTSQuerySessionInformation(IntPtr.Zero, pSessionInfo[i].SessionID, WTSInfoClass.WTSConnectState, out connState, out count);
                        bool clientAddressBool = TSControl.WTSQuerySessionInformation(IntPtr.Zero, pSessionInfo[i].SessionID, WTSInfoClass.WTSClientAddress, out clientAddress, out count);

                        if (userNameBool && clientUserBool && stateTypeBool & connStateBool)
                        {
                            cum = new LogonUser();
                            cum.SessionId = pSessionInfo[i].SessionID;
                            cum.UserName = userName.ToString();
                            cum.ClientUserName = clientUser.ToString();
                            cum.SessionType = stateType.ToString();
                            cum.ProtocalType = (Silmoon.Windows.Systems.LogonUser.ClientProtocalType)((int)protocalType[0]);
                            cum.ConnectState = (WTS_CONNECTSTATE_CLASS)connState[0];

                            WTS_CLIENT_ADDRESS ad = new WTS_CLIENT_ADDRESS();


                            //var aa = clientAddress[1]; 在这里不知道如何获取ClientAddress
                        }
                        LogonUsers.Add(cum);
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.ToString());
                    }
                }
            }
            #endregion
            return LogonUsers;
        }