1 DWORD GetIntegrityLevel()  2 {  3  DWORD Result = 0; 4  if(!IsVista()) return Result; 5  HANDLE hToken;  6  HANDLE hProcess; 7  DWORD dwLengthNeeded;  8  DWORD dwError = ERROR_SUCCESS; 9  PTOKEN_MANDATORY_LABEL pTIL = NULL; 10  DWORD dwIntegrityLevel;11  hProcess = GetCurrentProcess(); 12  if (OpenProcessToken(hProcess, TOKEN_QUERY | TOKEN_QUERY_SOURCE, &hToken))  13  { 14   if (!GetTokenInformation(hToken, (::TOKEN_INFORMATION_CLASS)TokenIntegrityLevel, NULL, 0, &dwLengthNeeded)) 15   { 16    dwError = GetLastError(); 17    if (dwError == ERROR_INSUFFICIENT_BUFFER) 18    { 19     pTIL = (PTOKEN_MANDATORY_LABEL)LocalAlloc(0, dwLengthNeeded); 20     if (pTIL != NULL) 21     { 22      if (GetTokenInformation(hToken, (::TOKEN_INFORMATION_CLASS)TokenIntegrityLevel, pTIL, dwLengthNeeded, &dwLengthNeeded)) 23      { 24       dwIntegrityLevel = *GetSidSubAuthority(pTIL->Label.Sid,  25        (DWORD)(UCHAR)(*GetSidSubAuthorityCount(pTIL->Label.Sid)-1));26       if (dwIntegrityLevel < SECURITY_MANDATORY_MEDIUM_RID) 27       { 28        Result = IL_LOW;          29         MessageBox(0,"low","low",MB_OK);30       } 31       else if (dwIntegrityLevel >= SECURITY_MANDATORY_MEDIUM_RID &&  32        dwIntegrityLevel < SECURITY_MANDATORY_HIGH_RID) 33       { 34        Result = IL_MEDIUM; 35         MessageBox(0,"MEDIUM","MEDIUM",MB_OK);36       } 37       else if (dwIntegrityLevel >= SECURITY_MANDATORY_HIGH_RID) 38       { 39        Result = IL_HIGH; 40         MessageBox(0,"HIGH","HIGH",MB_OK);41       } 42      }43      LocalFree(pTIL); 44     } 45    } 46   } 47   CloseHandle(hToken); 48  }49  return Result; 50 }