def GetServiceCustomOption(serviceName, option, defaultValue = None):
    # First param may also be a service class/instance.
    # This allows services to pass "self"
    try:
        serviceName = serviceName._svc_name_
    except __HOLE__:
        pass
    key = win32api.RegCreateKey(win32con.HKEY_LOCAL_MACHINE, "System\\CurrentControlSet\\Services\\%s\\Parameters" % serviceName)
    try:
        try:
            return win32api.RegQueryValueEx(key, option)[0]
        except win32api.error:  # No value.
            return defaultValue
    finally:
        win32api.RegCloseKey(key)
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/python/Lib/site-packages/win32/lib/win32serviceutil.py/GetServiceCustomOption