Как свернуть другую программу? - C#

[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
 
private void button_Click(object sender, EventArgs e)
{
    IntPtr calc = FindWindow(null, "Калькулятор");
    ShowWindow(calc, 6);
}