The concept for building a vertical slider is the same, but the math is
different. When you drag the slider up, the y-axis pixel number decreases, so
the formula used to convert the y-axis to a variable for the setVolume method
needs to take this into account. The following is the formula used for a
vertical slider:
myMusic.setVolume(100-(vslidery-volCalc))
The variable "vslidery" represents the current y-axis location of the slider
(which has the movie clip instance name of "vslider"). The following is
the code for the vertical slider, this time without the "//" comments. The
movie clip "vslider" is on top of a base image movie clip called "base".