aktuelle angemeldete Benutzer auslesen

[Jonny F.]

//**********************************************************************
//
//  FUNCTION:     GetCurrentUserAndDomain - This function looks up
//                the user name and domain name for the user account
//                associated with the calling thread.
//
//  PARAMETERS:   szUser - a buffer that receives the user name
//                pcchUser - the size, in characters, of szUser
//                szDomain - a buffer that receives the domain name
//                pcchDomain - the size, in characters, of szDomain
//
//  RETURN VALUE: TRUE if the function succeeds. Otherwise, FALSE and
//                GetLastError() will return the failure reason.
//
//                If either of the supplied buffers are too small,
//                GetLastError() will return ERROR_INSUFFICIENT_BUFFER
//                and pcchUser and pcchDomain will be adjusted to
//                reflect the required buffer sizes.
//
//**********************************************************************

BOOL GetCurrentUserAndDomain(PTSTR szUser, PDWORD pcchUser,
      PTSTR szDomain, PDWORD pcchDomain) {

BOOL         fSuccess = FALSE;
   HANDLE       hToken   = NULL;
   PTOKEN_USER  ptiUser  = NULL;
   DWORD        cbti     = 0;
   SID_NAME_USE snu;

__try {

// Get the calling thread's access token.
      if (!OpenThreadToken(GetCurrentThread(), TOKEN_QUERY, TRUE,
            &hToken)) {

if (GetLastError() != ERROR_NO_TOKEN)
            __leave;

// Retry against process token if no thread token exists.
         if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY,
               &hToken))
            __leave;
      }

// Obtain the size of the user information in the token.
      if (GetTokenInformation(hToken, TokenUser, NULL, 0, &cbti)) {

// Call should have failed due to zero-length buffer.
         __leave;

} else {

// Call should have failed due to zero-length buffer.
         if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
            __leave;
      }

// Allocate buffer for user information in the token.
      ptiUser = (PTOKEN_USER) HeapAlloc(GetProcessHeap(), 0, cbti);
      if (!ptiUser)
         __leave;

// Retrieve the user information from the token.
      if (!GetTokenInformation(hToken, TokenUser, ptiUser, cbti, &cbti))
         __leave;

// Retrieve user name and domain name based on user's SID.
      if (!LookupAccountSid(NULL, ptiUser->User.Sid, szUser, pcchUser,
            szDomain, pcchDomain, &snu))
         __leave;

fSuccess = TRUE;

} __finally {

// Free resources.
      if (hToken)
         CloseHandle(hToken);

if (ptiUser)
         HeapFree(GetProcessHeap(), 0, ptiUser);
   }

return fSuccess;
}

Hab des Api dings hier grad gefunden, kann man vielleicht damit was anfangen.

MfG Jonny F.