how to display Y-axis title in 90 degree relative to X-axis in a plot?

i am figuring out how to put Y-axis title on a vertical orientation instead of horizontal direction just like X-axis title in a plot. Can anybody have an idea how to do it?

Thanks in advance.

A simple search turned this up: http://visualbasicforum.com/showthread.php?t=94707. About 3-4 threads down is what you're looking for.