Looking Up the Current User and Domain

• Microsoft Win32 Application Programming Interface (API) included with:

      - Microsoft Windows NT versions 3.1 and 3.5
  

SUMMARY

Program Manager displays the logged in user account and domain name in its windows title. This information can be retrieved programmatically by extracting the user SID from the current access token and then looking up the account and domain name via the LookupAccountSid() Win32 API. Below is sample code demonstrating this technique:

Sample Code

void ShowUserDomain(void)

     HANDLE hProcess, hAccessToken;
       UCHAR InfoBuffer[1000],szAccountName[200], szDomainName[200];
       PTOKEN_USER pTokenUser = (PTOKEN_USER)InfoBuffer;
       DWORD dwInfoBufferSize,dwAccountSize = 200, dwDomainSize = 200;
       SID_NAME_USE snu;

       hProcess = GetCurrentProcess();

       OpenProcessToken(hProcess,TOKEN_READ,&hAccessToken);

       GetTokenInformation(hAccessToken,TokenUser,InfoBuffer,
            1000, &dwInfoBufferSize);

       LookupAccountSid(NULL, pTokenUser->User.Sid, szAccountName,
            &dwAccountSize,szDomainName, &dwDomainSize, &snu);

    printf("%s\\%s\n",szDomainName,szAccountName);