What you're looking for is the Worksheet_SelectionChange event.
Right click the sheet tab then View Code.
Select Worksheet from the drop down where it probably says (General).
All the different worksheet events will now appear in the other drop down.
This assumes that what you are referring to as a table is in fact an Excel table, not a standard range.
Code:
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
'limit to single cell selection
If Target.Count > 1 Then Exit Sub
'limit to the first column of data in the first table on the sheet
If Intersect(Target, Me.ListObjects(1).ListColumns(1).DataBodyRange) Is Nothing Then
Exit Sub
Else
' do what's required
' for example
MsgBox "The sheet address of the cell you just entered is " & Target.Address
'
'
End If
End Sub
Hope this helps.