抓取窗口，控制最大化最小化测试

using   System.Runtime.InteropServices;
class Program
    {
        static void Main(string[] args)
        {
            IntPtr maindHwnd = FindWindow("IEFrame", null);   //获取IE窗口
            if (maindHwnd != IntPtr.Zero)
            {
                const int SYSCOMMAND = 0x0112;
                const int MaxSize = 0xF030;                  //最大化
                const int MinSize = 0xf020;                  //最小化
                SendMessage(maindHwnd, SYSCOMMAND, MaxSize, 0);                  
            }
            else
            {
                Console.WriteLine("没有找到窗口");
            }
            //Console.ReadLine();
        }
        //引入方法

        [DllImport("user32.dll", EntryPoint = "FindWindow")]
        private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
        [DllImport("user32.dll", EntryPoint = "FindWindow")]
        private static extern IntPtr FindWindow(string strClass, string strWindow);
        [DllImport("user32.dll", EntryPoint = "SendMessage")]
        private static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
    }