AnalysisEngine.BetterListView.WndProc C# (CSharp) Method

        protected override void WndProc(ref Message m)
        {
            base.WndProc(ref m);
            if (m.Msg == 20)
            {
                if (this.Items.Count == 0)
                {
                    _b = true;
                    Graphics g = this.CreateGraphics();
                    int w = (this.Width - g.MeasureString(message,
                      this.Font).ToSize().Width) / 2;
                    g.DrawString(message, this.Font,
                      SystemBrushes.ControlText, w, 30);
                }
            }

            if (m.Msg == 4127) this.Invalidate();
        }