VBA trigger macro on cell value change

Question

This should be simple. When the value of a cell changes I want to trigger some VBA code. The cell (D3) is a calculation from two other cells =B3*C3. I have atte

Answer 1

Or try

Private Sub Worksheet_Change(ByVal Target As Range)
Dim numdependences As Integer
On Error Resume Next
HasDependents = Target.Dependents.Count
If Err = 0 Then
    If InStr(Target.Dependents.Address, "$D$3") <> 0 Then
        MsgBox "change"
    End If
End If
On Error GoTo 0
End Sub

You need the error control in case you change a cell that has not dependents.