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copied!<p>One way is using the <a href="http://msdn.microsoft.com/en-us/library/ms686837%28VS.85%29.aspx" rel="noreferrer">Tool Help library</a> (see TlHelp32 unit), or <a href="http://msdn.microsoft.com/en-us/library/ms682629%28VS.85%29.aspx" rel="noreferrer">EnumProcesses</a> on Windows NT (see PsAPI unit). Have a look at <code>JclSysInfo.RunningProcessesList</code> in the <a href="http://jcl.delphi-jedi.org/" rel="noreferrer" title="JEDI Code Library">JCL</a> for an example.</p> <p>Here's a quick example of how to get the user name of a process:</p> <pre><code>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, 0, InfoSize); User := AllocMem(InfoSize * 2); try if GetTokenInformation(ProcessToken, TokenUser, User, InfoSize * 2, InfoSize) then begin DomainNameSize := SizeOf(_DomainName); UserNameSize := SizeOf(_UserName); Result := LookupAccountSid(nil, User^.User.Sid, _UserName, UserNameSize, _DomainName, DomainNameSize, Use); if Result then begin SetString(DomainName, _DomainName, StrLen(_DomainName)); SetString(UserName, _UserName, StrLen(_UserName)); end; end; finally FreeMem(User); end; finally CloseHandle(ProcessToken); end; finally CloseHandle(ProcessHandle); end; end; </code></pre>

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