Hello,
I have been fighting with it for some time now, but something aint right here. When I press Win+Shift+Escape nothing happens, and something should happen. As far as I know, XOR operator is used to concatenate multiple modifiers. Code below:
using radio42;
using YoutubeExplode;
using YoutubeExplode.Models;
using YoutubeExplode.Models.MediaStreams;
using DavyKager;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using Un4seen.Bass;
namespace InviTube
{
    public partial class WND_Prefs : Form
    {
        [DllImport("user32.dll")]
        public static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vlc);
        #region Constants
        private const string EMail = "";
        private const string RegistrationKey = "";
        private const int InviModifier = (int)Keys.LWin |(int)Keys.LShiftKey;
        #endregion
        public WND_Prefs()
        {
            InitializeComponent();
            BassNet.Registration(EMail, RegistrationKey);
            RegisterHotKey(this.Handle, (int)KeyboardShortcuts.ExitApplication, InviModifier, (int)Keys.Escape);
            this.Hide();
        }
        protected override void WndProc(ref Message m)
        {
            if (m.Msg == 0x0312)
            {
                int id = m.WParam.ToInt32();
                switch (id)
                {
                    case (int)KeyboardShortcuts.ExitApplication:
                            MessageBox.Show("Koty!");
                        break;
                    default:
                        break;
                }
            }
                base.WndProc(ref m);
        }
    }
}