How to run Excel VBA code upon change in cell value?

To run Excel VBA code when a cell value changes, you can use the `Worksheet_Change` event. This event triggers whenever a cell in the worksheet is changed. Here’s how you can set it up:

1. Open the VBA Editor: Press `Alt + F11` in Excel to open the Visual Basic for Applications (VBA) editor.

2. Insert the VBA Code:
– In the VBA editor, locate the Project Explorer on the left side.
– Find the workbook and worksheet where you want the code to run.
– Double-click the worksheet name under “Microsoft Excel Objects” to open its code window.
– In the code window, enter the `Worksheet_Change` subroutine. This is where you’ll put the code that should run when a cell value changes.

3. Example Code:
Here’s a simple example that displays a message box when the value in cell A1 changes:

“`vba
Private Sub Worksheet_Change(ByVal Target As Range)
‘ Check if the change happened in cell A1
If Not Intersect(Target, Me.Range(“A1”)) Is Nothing Then
MsgBox “Cell A1 has changed!”
End If
End Sub
“`

This code checks if the changed cell is A1. If it is, a message box pops up.

4. Customize the Code:
– You can modify the `If` statement to check for changes in a different cell or range of cells.
– Replace the `MsgBox` line with your own VBA code that you want to execute when the cell value changes.

5. Save and Test:
– Save your workbook, preferably in a macro-enabled format (like `.xlsm`).
– Test the code by changing the value in the specified cell in Excel and see if it triggers your VBA code.

Remember that the `Worksheet_Change` event can be triggered by any change in the worksheet, so it’s important to clearly define the cell or range of cells you want to monitor to avoid unnecessary execution of your VBA code.

How to run Excel VBA code upon change in cell value