摘要：
1 private bool m_isMouseDown = false; 2 private Point m_mousePos = new Point(); 3 protected override void OnMouseDown(MouseEventArgs e) 4 { 5 base.OnMouseDown(e); 6 m_mousePos = Cursor.Position; 7 m_isMouseDown = true; 8 } 9 10 protected override void OnMouseUp(MouseEventArgs e)11 {12 base.OnMouseU. 阅读全文
