Public ReadOnly Property EditingControl As Control

Dim instance As EditorNotifyEventArgs
Dim value As Control
 
value = instance.EditingControl

public Control EditingControl {get;}

private void fpSpread1_EditChange(object sender, FarPoint.Win.Spread.EditorNotifyEventArgs e)
{
    if (e.EditingControl.GetType().Equals(typeof(FarPoint.Win.Spread.CellType.GeneralEditor)))
    {
        textBox1.Text = "You are currently editing cell " + e.Row + " - " + e.Column + " on sheet " + e.View.ActiveSheetIndex;
    }
}

Private Sub FpSpread1_EditChange(ByVal sender As Object, ByVal e As FarPoint.Win.Spread.EditorNotifyEventArgs) Handles FpSpread1.EditChange
    If TypeOf e.EditingControl Is FarPoint.Win.Spread.CellType.GeneralEditor Then
        TextBox1.Text = "You are currently editing cell " & e.Row & " - " & e.Column & " on sheet " & e.View.ActiveSheetIndex
    End If