Connecting a button bar to a range slider

[Greg]

In my active report I have a data range slider for the months of the year with labels Jan, Feb, etc.  I also have a button bar for quarters.  I want to link the quarters button bar to the range slider so that when I click on a quarter the range slider sets the minimum and maximum values accordingly.  I have defined first month and last month properties for the quarter buttons but I don't know how to link it to the slider so that it sets the minimum and maximum values respectively.  Any thoughts?  Thanks.