This example selects the intersection of two named ranges, rg1 and rg2, on Sheet1. If the ranges don't intersect, the example displays a message.
Worksheets("Sheet1").Activate
Set isect = Application.Intersect(Range("rg1"), Range("rg2"))
If isect Is Nothing Then
MsgBox "Ranges do not intersect"
Else
isect.Select
End If