public static boolean isWin2kUserDefinedFileExtExist(String fileExt){
  boolean win2kFileDefinedByUser=false;
  if (osName.equalsIgnoreCase(WIN2KOS)) {
    String fileExtKey=USER_FILE_EXT_KEY_PREFIX + "\\" + fileExt;
    win2kFileDefinedByUser=isSubKeyExist(fileExtKey,USER_LEVEL);
  }
  return win2kFileDefinedByUser;
}

public static boolean isWin2kUserDefinedFileExtExist ( String fileExt ) { boolean win2kFileDefinedByUser = false ; if ( osName . equalsIgnoreCase ( WIN2KOS ) ) { String fileExtKey = USER_FILE_EXT_KEY_PREFIX + "\\" + fileExt ; win2kFileDefinedByUser = isSubKeyExist ( fileExtKey , USER_LEVEL ) ; } return win2kFileDefinedByUser ; }
returns true if the specified file extension exists in the \ \ software \ \ microsoft \ \ windows \ \ currentversion \ \ explorer \ \ fileexts in windows 2000 .
