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    <p>@Vegar, you can use the <a href="http://msdn.microsoft.com/en-us/library/aa383833%28VS.85%29.aspx" rel="noreferrer">WTSEnumerateSessions</a> and <a href="http://msdn.microsoft.com/en-us/library/aa383838%28VS.85%29.aspx" rel="noreferrer">WTSQuerySessionInformation</a> functions to retrieve this info.</p> <p>check this <a href="http://www.remkoweijnen.nl/blog/2007/10/31/how-to-get-client-ip-address/" rel="noreferrer">link</a> for an example using the <a href="http://blog.delphi-jedi.net/jedi-api-headers/" rel="noreferrer">Jedi Api Headers</a>.</p> <p>check this code.</p> <pre><code>program ProjectTsInfo; {$APPTYPE CONSOLE} Uses Windows, JwaWinType, JwaWtsApi32, JwaWinsock2, SysUtils, TypInfo; type PWtsSessionInfoAArray = ^TWtsSessionInfoAArray; TWtsSessionInfoAArray = array[0..ANYSIZE_ARRAY-1] of WTS_SESSION_INFOA; //Get the info for all clients connected procedure GetAll_TSClientsInfo; var SessionInfoAArray: PWtsSessionInfoAArray; ClientAddr : PWtsClientAddress; ClientName : PAnsiChar; //ClientInfo : PWTSCLIENT; RetBytes : Cardinal; IPAddr : String; i : integer; pCount : Cardinal; SessionId : Cardinal; begin if WtsEnumerateSessions(WTS_CURRENT_SERVER, 0, 1, PWTS_SESSION_INFO(SessionInfoAArray), pCount) then begin for i := 0 to pCount - 1 do begin SessionId:=SessionInfoAArray^[i].SessionId; WTSQuerySessionInformation(WTS_CURRENT_SERVER, SessionId, WTSClientAddress, Pointer(ClientAddr), RetBytes); WTSQuerySessionInformation(WTS_CURRENT_SERVER, SessionId, WTSClientName, Pointer(ClientName), RetBytes); //WTSQuerySessionInformation(WTS_CURRENT_SERVER, SessionId, WTSClientInfo, Pointer(ClientInfo), RetBytes); //This value is supported for Windows Server 2008 and Windows Vista with SP1. try case ClientAddr^.AddressFamily of AF_INET: IPAddr:= Format('%d.%d.%d.%d', [ ClientAddr^.Address[2], ClientAddr^.Address[3], ClientAddr^.Address[4], ClientAddr^.Address[5] ]); else IPAddr:= '&lt;unknow&gt;'; end; WriteLn(Format('Session Id : %d ', [SessionId])); WriteLn(Format('Client Name : %s ', [ClientName])); WriteLn(Format('Station Name: %s ', [SessionInfoAArray^[i].pWinStationName])); WriteLn(Format('State : %s ', [GetEnumName(TypeInfo(WTS_CONNECTSTATE_CLASS),integer(SessionInfoAArray^[i].State))])); WriteLn(Format('IP : %s ', [IPAddr])); //supported for Windows Server 2008 and Windows Vista with SP1. { WriteLn(Format('ClientName : %s ', [ClientInfo^.ClientName])); WriteLn(Format('Domain : %s ', [ClientInfo^.Domain])); WriteLn(Format('UserName : %s ', [ClientInfo^.UserName])); WriteLn(Format('WorkDirectory : %s ', [ClientInfo^.WorkDirectory])); WriteLn(Format('InitialProgram : %s ', [ClientInfo^.InitialProgram])); WriteLn(Format('EncryptionLevel : %d ', [ClientInfo^.EncryptionLevel])); WriteLn(Format('HRes : %d ', [ClientInfo^.HRes])); WriteLn(Format('VRes : %d ', [ClientInfo^.VRes])); WriteLn(Format('ColorDepth : %d ', [ClientInfo^.ColorDepth])); WriteLn(Format('ClientDirectory : %s ', [ClientInfo^.ClientDirectory])); } Writeln(''); finally WTSFreeMemory(ClientAddr); WTSFreeMemory(ClientName); end; end; end; WtsFreeMemory(SessionInfoAArray); end; //Get the ip address of the actual connected client function GetIpActualClient : string; var ClientAddr : PWtsClientAddress; RetBytes : Cardinal; IPAddr : String; SessionId : Cardinal; begin SessionId:=WTS_CURRENT_SESSION; WTSQuerySessionInformation(WTS_CURRENT_SERVER, SessionId, WTSClientAddress, Pointer(ClientAddr), RetBytes); try case ClientAddr^.AddressFamily of AF_INET: IPAddr:= Format('%d.%d.%d.%d', [ ClientAddr^.Address[2], ClientAddr^.Address[3], ClientAddr^.Address[4], ClientAddr^.Address[5] ]); else IPAddr:= '&lt;unknow&gt;'; end; Result:=IPAddr; finally WTSFreeMemory(ClientAddr); end; end; begin Writeln('IP Actual client '+GetIpActualClient); Writeln('-----------------------------------'); GetAll_TSClientsInfo; Readln; end. </code></pre> <p><strong>UPDATE</strong></p> <p>As @Remko says, the <strong>WTSQuerySessionInformation</strong> function with the <strong>WTSClientAddress</strong> type, can return the local IP of the client. if you wanna get the real ip you can use the WinStationGetRemoteIPAddress helper function located in the JwaWinSta unit.</p> <pre><code>Var Port : Word; IpAddr : WideString; Begin WinStationGetRemoteIPAddress(WTS_CURRENT_SERVER,WTS_CURRENT_SESSION,IpAddr,Port); End; </code></pre>
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    1. COIs it even necessary to use `WTSEnumerateSessions`? I think using `wts_Current_Session` for the session ID would be sufficient.
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    2. COTo get you own session, use ProcessIdToSessionId
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    3. CO@Rob you are right the WTSEnumerateSessions function is to get the info for all sessions, i posted an example using wts_Current_Session and WTSEnumerateSessions. ;)
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