Opentk/Source/Framework/WindowedForm.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace OpenTK
{
    public partial class WindowedForm : Form
    {
        public WindowedForm()
        {
            this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);            // No Need To Erase Form Background
            this.SetStyle(ControlStyles.Opaque, true);                          // No Need To Draw Form Background
            //this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);           // Buffer Control
            //this.SetStyle(ControlStyles.ResizeRedraw, true);                    // Redraw On Resize
            this.SetStyle(ControlStyles.UserPaint, true);                       // We'll Handle Painting Ourselves
        }
    }
}