/**
* Seeks in the named broadcast.
* \param p_instance the instance
* \param psz_name the name of the broadcast
* \param f_percentage the percentage to seek to
* \param p_exception an initialized exception
/**
* Seeks in the named broadcast.
* \param p_instance the instance
* \param psz_name the name of the broadcast
* \param f_percentage the percentage to seek to
* \param p_exception an initialized exception