Windows API ——GetVersionEx——獲取操作系統版本信息

//獲取系統版本
BOOL GetOSName( CString& csOsName )
{
 OSVERSIONINFOEX osvi;
 SYSTEM_INFO si;
 BOOL bOsVersionInfoEx;
 ZeroMemory(&si, sizeof(SYSTEM_INFO));
 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));

 // Try calling GetVersionEx using the OSVERSIONINFOEX structure.
 // If that fails, try using the OSVERSIONINFO structure.

 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

 bOsVersionInfoEx = GetVersionEx((OSVERSIONINFO *) &osvi);
 if( !bOsVersionInfoEx )
 {
  osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
  if (! GetVersionEx ( (OSVERSIONINFO *) &osvi) ) 
   return FALSE;
 }

 // Call GetNativeSystemInfo if supported
 // or GetSystemInfo otherwise.
 else GetSystemInfo(&si);

 switch (osvi.dwPlatformId)
 {
  // Test for the Windows NT product family.

 case VER_PLATFORM_WIN32_NT:

  // Test for the specific product.

  if ( osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 0 )
  {
   if( osvi.wProductType == VER_NT_WORKSTATION )
   {
    csOsName += _T( "Windows Vista " );
   }
   else 
   {
    csOsName += _T( "Windows Server \"Longhorn\" " );
   }
  }

  if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 2 )
  {
   if( osvi.wProductType == VER_NT_WORKSTATION &&
    si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64)
   {
    csOsName += _T( "Microsoft Windows XP Professional x64 Edition " );
   }
   else 
   {
    csOsName += _T( "Microsoft Windows Server 2003, " );
   }
  }

  if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1 )
  {
   csOsName += _T( "Microsoft Windows XP " );
  }

  if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0 )
  {
   csOsName += _T( "Microsoft Windows 2000 " );
  }

  if ( osvi.dwMajorVersion <= 4 )
  {
   csOsName += _T( "Microsoft Windows NT " );
  }

  // Test for specific product on Windows NT 4.0 SP6 and later.
  if( bOsVersionInfoEx )
  {
   // Test for the workstation type.
   if ( osvi.wProductType == VER_NT_WORKSTATION &&
    si.wProcessorArchitecture!=PROCESSOR_ARCHITECTURE_AMD64)
   {
    if( osvi.dwMajorVersion == 4 )
    {
     csOsName += _T( "Workstation 4.0 " );
    }
    else if( osvi.wSuiteMask & VER_SUITE_PERSONAL )
    {
     csOsName += _T( "Home Edition " );
    }
    else 
    {
     csOsName += _T( "Professional " );
    }
   }

   // Test for the server type.
   else if ( osvi.wProductType == VER_NT_SERVER || 
    osvi.wProductType == VER_NT_DOMAIN_CONTROLLER )
   {
    if(osvi.dwMajorVersion==5 && osvi.dwMinorVersion==2)
    {
     if ( si.wProcessorArchitecture ==
      PROCESSOR_ARCHITECTURE_IA64 )
     {
      if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
      {
       csOsName += _T("Datacenter Edition for Itanium-based Systems");
      }
      else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
      {
       csOsName += _T("Enterprise Edition for Itanium-based Systems");
      }
     }

     else if ( si.wProcessorArchitecture ==
      PROCESSOR_ARCHITECTURE_AMD64 )
     {
      if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
      {
       csOsName += _T( "Datacenter x64 Edition " );
      }
      else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
      {

      }
      else 
      {
       csOsName += _T( "Standard x64 Edition " );
      }
     }
     else
     {
      if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
      {
       csOsName += _T( "Datacenter Edition " );
      }
      else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
      {
       csOsName += _T( "Enterprise Edition " );
      }
      else if ( osvi.wSuiteMask & VER_SUITE_BLADE )
      {
       csOsName += _T( "Web Edition " );
      }
      else 
      {
       csOsName += _T( "Standard Edition " );
      }
     }
    }
    else if(osvi.dwMajorVersion==5 && osvi.dwMinorVersion==0)
    {
     if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
     {
      csOsName += _T( "Datacenter Server " );
     }
     else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
     {
      csOsName += _T( "Advanced Server " );
     }
     else 
     {
      csOsName += _T( "Server " );
     }
    }
    else  // Windows NT 4.0 
    {
     if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
     {
      csOsName += _T( "Server 4.0, Enterprise Edition " );
     }
     else 
     {
      csOsName += _T( "Server 4.0 " );
     }
    }
   }
  }
  // Test for specific product on Windows NT 4.0 SP5 and earlier
  else  
  {
   HKEY hKey;
   TCHAR szProductType[256];
   DWORD dwBufLen=256*sizeof(TCHAR);
   LONG lRet;

   lRet = RegOpenKeyEx( HKEY_LOCAL_MACHINE,
    _T("SYSTEM\\CurrentControlSet\\Control\\ProductOptions"), 
    0, KEY_QUERY_VALUE, &hKey );
   if( lRet != ERROR_SUCCESS )
    return FALSE;

   lRet = RegQueryValueEx( hKey, TEXT("ProductType"),
    NULL, NULL, (LPBYTE) szProductType, &dwBufLen);
   RegCloseKey( hKey );

   if( (lRet != ERROR_SUCCESS) ||
    (dwBufLen > 256*sizeof(TCHAR)) )
    return FALSE;

   if ( lstrcmpi( TEXT("WINNT"), szProductType) == 0 )
   {
    csOsName += _T( "Workstation " );
   }
   if ( lstrcmpi( TEXT("LANMANNT"), szProductType) == 0 )
   {
    csOsName += _T( "Server " );
   }
   if ( lstrcmpi( TEXT("SERVERNT"), szProductType) == 0 )
   {
    csOsName += _T( "Advanced Server " );
   }
   CString cstmp;
   cstmp.Format( _T( "%d.%d " ), osvi.dwMajorVersion, osvi.dwMinorVersion );
   csOsName += cstmp;
  }

  // Display service pack (if any) and build number.

  if( osvi.dwMajorVersion == 4 && 
   lstrcmpi( osvi.szCSDVersion, TEXT("Service Pack 6") ) == 0 )
  { 
   HKEY hKey;
   LONG lRet;

   // Test for SP6 versus SP6a.
   lRet = RegOpenKeyEx( HKEY_LOCAL_MACHINE,
    _T("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Hotfix\\Q246009"), 
    0, KEY_QUERY_VALUE, &hKey );
   if( lRet == ERROR_SUCCESS )
   {
    CString cstmp;
    cstmp.Format( _T( "Service Pack 6a (Build %d)" ), osvi.dwBuildNumber & 0xFFFF );
    csOsName += cstmp;
   }        
   else // Windows NT 4.0 prior to SP6a
   {
    CString cstmp;
    cstmp.Format( _T( "%s (Build %d)" ), osvi.szCSDVersion, osvi.dwBuildNumber & 0xFFFF );
    csOsName += cstmp;
   }
   RegCloseKey( hKey );
  }
  else // not Windows NT 4.0 
  {
   CString cstmp;
   cstmp.Format( _T( "%s (Build %d)" ), osvi.szCSDVersion, osvi.dwBuildNumber & 0xFFFF );
   csOsName += cstmp;
  }

  break;

  // Test for the Windows Me/98/95.
 case VER_PLATFORM_WIN32_WINDOWS:

  if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 0)
  {
   csOsName += _T( "Microsoft Windows 95 " );
   if (osvi.szCSDVersion[1]=='C' || osvi.szCSDVersion[1]=='B')
   {
    csOsName += _T( "OSR2 " );
   }
  } 

  if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 10)
  {
   csOsName += _T("Microsoft Windows 98 ");
   if ( osvi.szCSDVersion[1]=='A' || osvi.szCSDVersion[1]=='B')
   {
    csOsName += _T("SE " );
   }
  } 

  if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 90)
  {
   csOsName += _T("Microsoft Windows Millennium Edition");
  } 
  break;

 case VER_PLATFORM_WIN32s:

  csOsName += _T("Microsoft Win32s\n");
  break;
 }
 return TRUE; 
}