Openfast individual pitch control time marching analysis using bladed style DLL

Dear Jason sir,
I am still in initial learning stage in Fast/ OpenFast . I think I am trying to use the Dll called (discon.dll) provided by NREL, by including it in the '5MW_Baseline ’ folder to be called from ServoDyn.Is it not a controller usable for simulation or is it limited in functionality to IPC , or I need to get yet another controller. Pardon me If I am wrong.
Thanks and Regards
Nitin Sivakumar