VS 2008 Need help changing a button's backcolor back to ActiveCaption

Hello
I set the backcolor of a button to ActiveCaption when I created it. Then in my code later on I changed it to cyan. Later still I want to reset the color back to ActiveCaption, But I get error messages that ActiveCaption is not a color. I've looked through the colors an can't seem to find the right color. Can you help me?
Thanks
George