$ reg query HKEY_CLASSES_ROOT\PerlScript /s ! REG.EXE VERSION 3.0 HKEY_CLASSES_ROOT\PerlScript REG_SZ PerlScript Language HKEY_CLASSES_ROOT\PerlScript\CLSID REG_SZ {F8D77580-0F09-11d0-AA61-3C284E000000} HKEY_CLASSES_ROOT\PerlScript\OLEScript HKEY_CLASSES_ROOT\PerlScript\Shell HKEY_CLASSES_ROOT\PerlScript\Shell\Open HKEY_CLASSES_ROOT\PerlScript\Shell\Open\Command REG_EXPAND_SZ perl.exe %1 %* $ reg query HKEY_CLASSES_ROOT\.pl /s ! REG.EXE VERSION 3.0 HKEY_CLASSES_ROOT\.pl REG_SZ PerlScript