Making Excel functions affect 'other' cells

Question

Let\'s say that I create a Sub (not a function) whose mission in life is to take the active cell (i.e. Selection) and set an adjacent cell to some value. This works fine.

Answer 1

Here's an easy VBA workaround that works. For this example, open a new Excel workbook and copy the following code into the code area for Sheet1 (not ThisWorkbook or a VBA Module). Then go into Sheet1 and put something into one of the upper-left cells of the worksheet. If you type a number and hit Enter, then the cell to the right will be updated with 4 times the number, and the cell background will become light-blue. Any other value causes the next cell to be cleared. Here's the code:

Dim busy As Boolean
Private Sub Worksheet_Change(ByVal Target As Range)
  If busy Then Exit Sub
  busy = True
  If Target.Row <= 10 And Target.Column <= 10 Then
    With Target.Offset(0, 1)
      If IsNumeric(Target) Then
        .Value = Target * 4
        .Interior.Color = RGB(212, 212, 255)
      Else
        .Value = Empty
        .Interior.ColorIndex = xlColorIndexNone
      End If
    End With
  End If
  busy = False
End Sub

The subroutine captures all cell change events in the sheet. If the row and column are both <= 10, then the cell to the right is set to 4 times the changed cell if the value is numeric; otherwise the cell to the right is cleared.