使用标准的win32 api，检测多个用户的最佳方法是什么？我有一个升级到我们的软件产品，当多个用户登录时无法运行。（我知道这是因为它的烦恼因素而应该避免的，但产品非常复杂。你必须要当我说真的没有其他解决方案时，请相信我。）谢谢。
答案 0 :(得分：4)
要同时登录多个用户，必须启用终端服务或快速用户切换。由于使用终端服务实现快速用户切换，因此首先需要确定操作系统是否已启用它。您可以将GetVersionEx与OSVERSIONINFOEX一起使用。检查VER_SUITE_SINGLEUSERTS和VER_SUITE_TERMINAL标志。
如果启用了TS，则可以使用WTSEnumerateSessions查看登录用户的数量。这仅在“终端服务”服务启动时有效。
如果机器不支持终端服务（或者服务未启动），则只能有一个用户登录。
答案 1 :(得分：2)
这是适用于XP，Server 2003，Vista和Server 2008的解决方案。请注意，这在Windows 2000上不起作用，因为“LsaEnumerateLogonSessions”在Windows 2000上不可用。此代码已修改来自Delphi-PRAXIS post。
要编译它，请在表单上创建一个带有TButton和TMemo的新VCL应用程序。然后复制并粘贴此代码，它应该编译。我在XP和Vista上测试过，效果很好。它将返回交互式和远程用户。
unit main;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
const
WTS_CURRENT_SERVER_HANDLE = 0;
type
PTOKEN_USER = ^TOKEN_USER;
_TOKEN_USER = record
User: TSidAndAttributes;
end;
TOKEN_USER = _TOKEN_USER;
USHORT = word;
_LSA_UNICODE_STRING = record
Length: USHORT;
MaximumLength: USHORT;
Buffer: LPWSTR;
end;
LSA_UNICODE_STRING = _LSA_UNICODE_STRING;
PLuid = ^LUID;
_LUID = record
LowPart: DWORD;
HighPart: LongInt;
end;
LUID = _LUID;
_SECURITY_LOGON_TYPE = (
seltFiller0, seltFiller1,
Interactive,
Network,
Batch,
Service,
Proxy,
Unlock,
NetworkCleartext,
NewCredentials,
RemoteInteractive,
CachedInteractive,
CachedRemoteInteractive);
SECURITY_LOGON_TYPE = _SECURITY_LOGON_TYPE;
PSECURITY_LOGON_SESSION_DATA = ^SECURITY_LOGON_SESSION_DATA;
_SECURITY_LOGON_SESSION_DATA = record
Size: ULONG;
LogonId: LUID;
UserName: LSA_UNICODE_STRING;
LogonDomain: LSA_UNICODE_STRING;
AuthenticationPackage: LSA_UNICODE_STRING;
LogonType: SECURITY_LOGON_TYPE;
Session: ULONG;
Sid: PSID;
LogonTime: LARGE_INTEGER;
LogonServer: LSA_UNICODE_STRING;
DnsDomainName: LSA_UNICODE_STRING;
Upn: LSA_UNICODE_STRING;
end;
SECURITY_LOGON_SESSION_DATA = _SECURITY_LOGON_SESSION_DATA;
_WTS_INFO_CLASS = (
WTSInitialProgram,
WTSApplicationName,
WTSWorkingDirectory,
WTSOEMId,
WTSSessionId,
WTSUserName,
WTSWinStationName,
WTSDomainName,
WTSConnectState,
WTSClientBuildNumber,
WTSClientName,
WTSClientDirectory,
WTSClientProductId,
WTSClientHardwareId,
WTSClientAddress,
WTSClientDisplay,
WTSClientProtocolType);
WTS_INFO_CLASS = _WTS_INFO_CLASS;
_WTS_CONNECTSTATE_CLASS = (
WTSActive, // User logged on to WinStation
WTSConnected, // WinStation connected to client
WTSConnectQuery, // In the process of connecting to client
WTSShadow, // Shadowing another WinStation
WTSDisconnected, // WinStation logged on without client
WTSIdle, // Waiting for client to connect
WTSListen, // WinStation is listening for connection
WTSReset, // WinStation is being reset
WTSDown, // WinStation is down due to error
WTSInit); // WinStation in initialization
WTS_CONNECTSTATE_CLASS = _WTS_CONNECTSTATE_CLASS;
function LsaFreeReturnBuffer(Buffer: pointer): Integer; stdcall;
function WTSGetActiveConsoleSessionId: DWORD; external 'Kernel32.dll';
function LsaGetLogonSessionData(LogonId: PLUID;
var ppLogonSessionData: PSECURITY_LOGON_SESSION_DATA): LongInt; stdcall;
external 'Secur32.dll';
function LsaNtStatusToWinError(Status: cardinal): ULONG; stdcall;
external 'Advapi32.dll';
function LsaEnumerateLogonSessions(Count: PULONG; List: PLUID): LongInt;
stdcall; external 'Secur32.dll';
function WTSQuerySessionInformationA(hServer: THandle; SessionId: DWORD;
WTSInfoClass: WTS_INFO_CLASS; var pBuffer: Pointer;
var pBytesReturned: DWORD): BOOL; stdcall; external 'Wtsapi32.dll';
type
TForm1 = class(TForm)
Button1: TButton;
Memo1: TMemo;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
function LsaFreeReturnBuffer; external 'secur32.dll' name 'LsaFreeReturnBuffer';
procedure GetActiveUserNames(var slUserList : TStringList);
var
Count: cardinal;
List: PLUID;
sessionData: PSECURITY_LOGON_SESSION_DATA;
i1: integer;
SizeNeeded, SizeNeeded2: DWORD;
OwnerName, DomainName: PChar;
OwnerType: SID_NAME_USE;
pBuffer: Pointer;
pBytesreturned: DWord;
sUser : string;
begin
//result:= '';
//Listing LogOnSessions
i1:= lsaNtStatusToWinError(LsaEnumerateLogonSessions(@Count, @List));
try
if i1 = 0 then
begin
i1:= -1;
if Count > 0 then
begin
repeat
inc(i1);
LsaGetLogonSessionData(List, sessionData);
//Checks if it is an interactive session
sUser := sessionData.UserName.Buffer;
if (sessionData.LogonType = Interactive)
or (sessionData.LogonType = RemoteInteractive)
or (sessionData.LogonType = CachedInteractive)
or (sessionData.LogonType = CachedRemoteInteractive) then
begin
//
SizeNeeded := MAX_PATH;
SizeNeeded2:= MAX_PATH;
GetMem(OwnerName, MAX_PATH);
GetMem(DomainName, MAX_PATH);
try
if LookupAccountSID(nil, sessionData.SID, OwnerName,
SizeNeeded, DomainName,SizeNeeded2,
OwnerType) then
begin
if OwnerType = 1 then //This is a USER account SID (SidTypeUser=1)
begin
sUser := AnsiUpperCase(sessionData.LogonDomain.Buffer);
sUser := sUser + '\';
sUser := sUser + AnsiUpperCase(sessionData.UserName.Buffer);
slUserList.Add(sUser);
// if sessionData.Session = WTSGetActiveConsoleSessionId then
// begin
// //Wenn Benutzer aktiv
// try
// if WTSQuerySessionInformationA
// (WTS_CURRENT_SERVER_HANDLE,
// sessionData.Session, WTSConnectState,
// pBuffer,
// pBytesreturned) then
// begin
// if WTS_CONNECTSTATE_CLASS(pBuffer^) = WTSActive then
// begin
// //result:= sessionData.UserName.Buffer;
// slUserList.Add(sessionData.UserName.Buffer);
// end;
// end;
// finally
// LSAFreeReturnBuffer(pBuffer);
// end;
//end;
end;
end;
finally
FreeMem(OwnerName);
FreeMem(DomainName);
end;
end;
inc(List);
try
LSAFreeReturnBuffer(sessionData);
except
end;
until (i1 = Count-1);// or (result <> '');
end;
end;
finally
LSAFreeReturnBuffer(List);
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
slUsers : TStringList;
begin
slUsers := TStringList.Create;
slUsers.Duplicates := dupIgnore;
slUsers.Sorted := True;
try
GetActiveUserNames(slUsers);
Memo1.Lines.AddStrings(slUsers);
finally
FreeAndNil(slUsers)
end;
end;
end.
答案 2 :(得分：0)
这可能是一种迂回的方式，但是在流程列表中运行并查看流程所有者是谁。