以下是如何获取进程用户名的快速示例：

type
  PTokenUser = ^TTokenUser;
  TTokenUser = packed record
    User: SID_AND_ATTRIBUTES;
  end;

function GetProcessUserName(ProcessID: Cardinal; out DomainName,UserName: string): Boolean;
var
  ProcessHandle,ProcessToken: THandle;
  InfoSize,UserNameSize,DomainNameSize: Cardinal;
  User: PTokenUser;
  Use: SID_NAME_USE;
  _DomainName,_UserName: array[0..255] of Char;
begin
  Result := False;
  DomainName := '';
  UserName := '';

  ProcessHandle := OpenProcess(PROCESS_QUERY_INFORMATION or PROCESS_VM_READ,False,ProcessID);
  if ProcessHandle = 0 then
    Exit;

  try
    if not OpenProcessToken(ProcessHandle,TOKEN_QUERY,ProcessToken) then
      Exit;

    try
      GetTokenInformation(ProcessToken,TokenUser,nil,InfoSize);
      User := AllocMem(InfoSize * 2);
      try
        if GetTokenInformation(ProcessToken,User,InfoSize * 2,InfoSize) then
        begin
          DomainNameSize := SizeOf(_DomainName);
          UserNameSize := SizeOf(_UserName);

          Result := LookupAccountSid(nil,User^.User.Sid,_UserName,_DomainName,DomainNameSize,Use);

          if Result then
          begin
            SetString(DomainName,StrLen(_DomainName));
            SetString(UserName,StrLen(_UserName));
          end;
        end;
      finally
        FreeMem(User);
      end;
    finally
      CloseHandle(ProcessToken);
    end;
  finally
    CloseHandle(ProcessHandle);
  end;
end;