C#

class Program
{
    struct Foo
    {
        public int abc;
    }

    static void Test(out Foo f)
    {
        f.abc = 200;

        return;
    }

    static void Main(string[] args)
    {
        Foo f1;
        f1.abc = 100;
        Test(out f1);

        // output 200
        Console.WriteLine(f1.abc);

        return;
    }
}

void inimationStart()
    {
        if (this.Visible)
            {
                panel1.SetBounds(-300, panel1.Location.Y, panel1.Width, panel1.Height);
                panel3.SetBounds(-360, panel3.Location.Y, panel3.Width, panel3.Height);
                panel4.SetBounds(-400, panel4.Location.Y, panel4.Width, panel4.Height);
                panel5.SetBounds(-460, panel5.Location.Y, panel5.Width, panel5.Height);
                panel6.SetBounds(-500, panel6.Location.Y, panel6.Width, panel6.Height);
                panel2.SetBounds(-560, panel2.Location.Y, panel2.Width, panel2.Height);
                this.Refresh();
                MessageBox.Show(this.Width.ToString());
                //this.Width = 350;
                for (int i = 0; i < 560; i += 20)
                {
                    if (i < 300)
                        panel1.SetBounds(panel1.Location.X + 20, panel1.Location.Y, panel1.Width, panel1.Height);
                    if (i < 360)
                        panel3.SetBounds(panel3.Location.X + 20, panel3.Location.Y, panel3.Width, panel3.Height);
                    if (i < 400)
                        panel4.SetBounds(panel4.Location.X + 20, panel4.Location.Y, panel4.Width, panel4.Height);
                    if (i < 460)
                        panel5.SetBounds(panel5.Location.X + 20, panel5.Location.Y, panel5.Width, panel5.Height);
                    if (i < 500)
                        panel6.SetBounds(panel6.Location.X + 20, panel6.Location.Y, panel6.Width, panel6.Height);
                    if (i < 560)
                        panel2.SetBounds(panel2.Location.X + 20, panel2.Location.Y, panel2.Width, panel2.Height);
                    
                    this.Refresh();
                }

            }
    }