nRF24L01 with MIRF Auto Acknowledgement working?

Hello, i would like to ask if there is any Auto Acknowledgement working in Mirf library or i shloud do this by my self? Or is there any other library that works with nRF24L01 and have some kind of ACK?

Thanks Roman

I don't know about MIRF, but the RF24 library provides explicit delivery acks and has the option to include application data in the ack. (Note that the response data has to be set up before the incoming message is received so it can't be used to provide command/response semantics.)