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

try this:

 Sub Worksheet_Change(ByVal Target As Range)

    If Not Intersect(Target, Target.Worksheet.Range("B1")) Is Nothing Then

      Call macro

    End If

 End Sub

looks for a change in value of cell B1, then executes "macro"