Checkbox Starting Checked

[Mark Guagenti <guagenti(at)foodsci.purdue.edu>]

Hello all,
I am having some problems finding out how to use checkboxes in IDL.  I
am looking for a way to have a
checkbox start (when the widget it realized) checked.  I thought there
would be some value that I would
have to set with Widget_Control but I don't see what that value is.  Am
I just missing it?  Any help on using
IDL's checkboxes would be appreciated.

Thanks in advance,
Mark