I don't know 98 but I found this direction:
If you don't see a little speaker icon in the taskbar tray, then open
the Sounds and Multimedia applet in the Control Panel.
If you have separate icons for "Sound" and "Multimedia", then click
the "Multimedia" icon. The Audio tab should be open by default - if
not, open it. Check the checkbox that says "display volume control
icon on taskbar". Click Ok. Then, open the volume control by
clicking little speaker icon in taskbar tray.



Thank you.