Set VNC encryption.
PRL_HANDLE PrlSrv_SetVNCEncryption( PRL_HANDLE hServer, PRL_CONST_STR sPubKey, PRL_CONST_STR sPrivKey, PRL_UINT32 nFlags );
PrlApiDisp.h
A handle of type PHT_JOB containing the results of operation.
To delete sertificate the empty sPubKey and sPrivKey should be specified.