This paper presents the results of an experiment using videoconferencing in a distance graduate course in the Computer Science Department at the Catholic University of Rio de Janeiro (Brazil). The purpose of the experiment was to test two videoconference technologies that are widely used on the Internet, Cu-SeeMe and Real technology, and to assess their performance and impact on a distance course. Objectives of the three stages of the experiment were: (1) to transmit the lectures live so that they could be watched at a distance simultaneously with the course site; (2) to transmit the lectures live and to record them for later use by the students; and (3) to make recorded lectures available so that students could watch them asynchronously. Results were assessed for later use in AulaNet, an environment for World Wide Web-based learning. CU-SeeMe proved to be suitable for synchronous events where interaction is necessary between participants. Real technology proved to be suitable for broadcasting information where interaction is not necessary, as it provides good quality audio and video, low transmission rates, and good continuity in the audio. Three figures present Cu-SeeMe windows, a remote student's screen showing CU-SeeMe and Real windows, and a page form the course Web site. (AEF)