'Return dict of registry keys and values.
All names are converted to lowercase.'

def read_values(cls, base, key):

    try:
        handle = RegOpenKeyEx(base, key)
    except RegError:
        return None
    d = {}
    i = 0
    while True:
        try:
            (name, value, type) = RegEnumValue(handle, i)
        except RegError:
            break
        name = name.lower()
        d[cls.convert_mbcs(name)] = cls.convert_mbcs(value)
        i += 1
    return d
