Hi oldjay

You can use the worksheet event shown below:

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
' Be sure to look at a single cell
If Target.Cells.Count = 1 Then
' Check if a cell iu column C is selected
If Target.Column = 3 Then
' Check id the selected cell is empty
If IsEmpty(Target) Then
MsgBox "On empty cell"
End If
End If
End If
End Sub


HTH,

Wouter