Obtains the currently set base VNC port number.
PRL_RESULT PrlDispCfg_GetVNCBasePort( PRL_HANDLE hDispConfig, PRL_UINT32_PTR pnPort );
PrlApiDisp.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.