Abstract: Sequential-playback objects (SPOs) such as audio messages, voicemail messages, video segments and the like are controlled in a centralized fashion in a computer-based system. The user is able to select SPOs, preferably using a pointer device such as a mouse. A single tool bar is displayed and used for controlling each of the selected SPOs so that there is no need to display two tool bars on the screen for controlling two different SPOs. Information relating to the status and characteristics of the SPOs are passed to the tool bar software so that the tool bar automatically provides the appropriate command execution for the particular SPO. Thus, the same tool bar will playback a video message or an audio message. By providing a single tool bar, screen clutter is reduced and, command execution is performed rapidly and computer resources are conserved.