Selected Cell within named range?

I'm hoping this question is very easy for the experienced Excel/VBA developers on this forum.

I want to use the Worksheet SelectionChange event to update part of my worksheet/UI depending on what cell(s) the user has selected.

As an example, if I have two named ranges - $A$1:$B$10 and $C$1:$D$10 - I want to detect whether the user is in range 1, range 2, or neither, then update elements of the UI.

How can I find out if the Target range is within one of the other ranges?