ATMLCommonLibrary.forms.HelpMessageBox.GetRoundedRect C# (CSharp) Method

        private GraphicsPath GetRoundedRect(RectangleF baseRect,
            float radius)
        {
            // if corner radius is less than or equal to zero,
            // return the original rectangle
            if (radius <= 0.0F)
            {
                GraphicsPath mPath = new GraphicsPath();
                mPath.AddRectangle(baseRect);
                mPath.CloseFigure();
                return mPath;
            }

            // if the corner radius is greater than or equal to
            // half the width, or height (whichever is shorter)
            // then return a capsule instead of a lozenge
            if (radius >= (Math.Min(baseRect.Width, baseRect.Height)) / 2.0)
                return GetCapsule(baseRect);

            // create the arc for the rectangle sides and declare
            // a graphics path object for the drawing
            float diameter = radius * 2.0F;
            SizeF sizeF = new SizeF(diameter, diameter);
            RectangleF arc = new RectangleF(baseRect.Location, sizeF);
            GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();

            // top left arc
            path.AddArc(arc, 180, 90);

            // top right arc
            arc.X = baseRect.Right - diameter;
            path.AddArc(arc, 270, 90);

            // bottom right arc
            arc.Y = baseRect.Bottom - diameter;
            path.AddArc(arc, 0, 90);

            // bottom left arc
            arc.X = baseRect.Left;
            path.AddArc(arc, 90, 90);

            path.CloseFigure();
            return path;
        }