Macro To Navigate Through Spreadsheet

when the user selects any cell(s), then hits the command button, I want the code to move the cell(s) selection to the far left i.e. Column "A". I've managed this is a roundabout way, but I'm trying to make a far more elegant version.

Set C = Selection
With C
While Not C.Previous Is Nothing
MsgBox C
Set C = C.Previous
Wend
End With

So C is the selection made my the user, for this example they are just selecting one cell. The MsgBox proves to me the code to moving the cell selection to the left, but the While condition falls as the Previous test condition fails and bombs the macro. I cannot think of another way of doing this. Is there a method that returns X and Y co-ordinates as numbers?