int/None = RegisterServiceCtrlHandler(serviceName, callback
, extra_args
)
Registers the Python service control handler function.
Parameters
serviceName : string
The name of the service. This is provided in args[0] of the service class
__init__ method.callback : object
The Python function that performs as the control function. This will be called with an
integer status argument.extra_args=False : bool
Is this callback expecting the additional 2 args passed by HandlerEx?
Return Value
If the service manager is in debug mode, this returns None, indicating
there is no service control manager handle, otherwise the handle to the Win32 service manager.