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    class Program
    {
        [DllImport("user32.dll")]
        static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, UIntPtr dwExtraInfo);

        public static void SendKey()
        {
            keybd_event((byte)0x41, (byte)0x45, 1, (UIntPtr)0);
            keybd_event((byte)0x41, (byte)0x45, 1 | 2, (UIntPtr)0);
        }

        [DllImport("kernel32.dll")]
        static extern void Sleep(Int32 time);

        static void Main(string[] args)
        {
            Console.ReadLine();
            Sleep(3000);
            SendKey();
            Console.WriteLine("A");
            Console.ReadLine();
        }
    }