Help:How to use a shock of Markov chain?

I’m a new user of dynare and don’t have much experience in using it.
However, I have to use a shock of Markov chain instead of using a AR(1) shock.
I have searched in user guide and haven’t found how to add such kind of shock?
Can any person help me with it.? Thank you very much.

There is not provision for Markov shocks in Dynare.