winform 窗體設置成無邊框、可拖拽、四周圓角

最近作一個及時通信系統的登陸界面，如今將界面用到的無邊框、可拖拽、四周圓角的方法分享以下：

一、無邊框的窗體： 把FormBorderStyle的屬性設置爲none

二、可拖拽：private Point mPoint = new Point();

        private void FormLogin_MouseDown(object sender, MouseEventArgs e)
        {
            mPoint.X = e.X;
            mPoint.Y = e.Y;
        }

        private void FormLogin_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                Point myPosittion = MousePosition;
                myPosittion.Offset(-mPoint.X, -mPoint.Y);
                Location = myPosittion;
            }
        }

三、四周圓角：       

　　private void FormLogin_Resize(object sender, EventArgs e)
        {
            SetWindowRegion();
        }

       public void SetWindowRegion()
        {
            System.Drawing.Drawing2D.GraphicsPath FormPath;
            FormPath = new System.Drawing.Drawing2D.GraphicsPath();
            Rectangle rect = new Rectangle(0, 0, this.Width, this.Height);
            FormPath = GetRoundedRectPath(rect, 10);
            this.Region = new Region(FormPath);

        }
        private GraphicsPath GetRoundedRectPath(Rectangle rect, int radius)
        {
            int diameter = radius;
            Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));
            GraphicsPath path = new GraphicsPath();

            // 左上角
            path.AddArc(arcRect, 180, 90);

            // 右上角
            arcRect.X = rect.Right - diameter;
            path.AddArc(arcRect, 270, 90);

            // 右下角
            arcRect.Y = rect.Bottom - diameter;
            path.AddArc(arcRect, 0, 90);

            // 左下角            arcRect.X = rect.Left;            path.AddArc(arcRect, 90, 90);            path.CloseFigure();//閉合曲線            return path;        }