/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void draw(object sender, PaintEventArgs e)
{
IntPtr dc = e.Graphics.GetHdc();
DrawRequest drawR = new DrawRequest();
drawR.hdc = dc;
drawR.left = 0;
drawR.right = Width;
drawR.top = 0;
drawR.bottom = Height;
manualRenderer.draw(drawR);
e.Graphics.ReleaseHdc(dc);
}