Problem with OpenTK in VB

Imports OpenTK
Imports OpenTK.Graphics
Imports OpenTK.Graphics.OpenGL
Public Class Form1

    Private Sub GL_Load(sender As Object, e As System.EventArgs) Handles GlControl1.Load
        GL.ClearColor(Color.Black)

        GL.MatrixMode(MatrixMode.Projection)
        GL.LoadIdentity()
        GL.Ortho(0, GlControl1.Width, GlControl1.Height, 0, 1, -1)
        GL.MatrixMode(MatrixMode.Modelview)

    End Sub

    Private Sub GlControl1_Paint(sender As Object, e As System.Windows.Forms.PaintEventArgs) Handles GlControl1.Paint
        GL.Clear(ClearBufferMask.ColorBufferBit)
        GL.LoadIdentity()

        GL.Begin(BeginMode.Polygon)
        GL.Color3(255, 0, 0)
        GL.Vertex2(0, 5)
        GL.Vertex2(5, -5)
        GL.Vertex2(-5, -5)
        GL.End()

        GL.Begin(BeginMode.Lines)
        GL.Color3(0, 255, 0)
        GL.Vertex2(50, 50)
        GL.Vertex2(100, 100)
        GL.End()

        GL.Flush()
        GraphicsContext.CurrentContext.VSync = True 'Caps frame rate as to not over run GPU
        GlControl1.SwapBuffers() 'Takes from the 'GL' and puts into control
    End Sub
End Class