public class DrawCanvas : Control { private int _scale = 10000; private Image m_bkImg = null; private Image m_bkScaledImg = null; private Point m_ptStart; private Point m_ptEnd; private Rectangle m_dstRect; private Rectangle m_srcRect; private VScrollBar m_vScrollBar; private HScrollBar m_hScrollBar; public DrawCanvas() { SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer, true); m_vScrollBar = new VScrollBar(); m_vScrollBar.Scroll += OnScroll; […]