Users can control the volume of any media by manipulating the adjust volume slider. The adjust volume slider works just like the Windows Media Player slider: sliding it to the left decreases volume, sliding it to the right increases the volume, and clicking the mute button  mutes the sound.

Controlling the Initial Volume

You can specify the initial volume of the C1MediaPlayer control by setting the C1MediaPlayer.Volume property to a value between 0 and 1. A value of 0 turns the volume off, a value of 1 turns the volume up to its maximum, and a value of 0.5 places the volume in the middle of the scale. If you'd rather mute the control at run time, you can also set the C1MediaPlayer.IsMuted property to True.