Using Find to search from back to front in a range

I have this simple macro:

Sub LastColRng()
Dim SelRange As Range
Set SelRange = Selection
Dim LastCol As Long

        SelRange.Resize(, 261).Select
          LastCol = SelRange.Find("*", after:=SelRange(1, 1), SearchDirection:=xlPrevious).Column
             MsgBox LastCol

End Sub

I expect it to return the column number of the rightmost cell with text in the range, but instead it returns the column number of the first cell in the range. What am I doing wrong?