Background changer main window

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.Windows.Forms;
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;


namespace Background_Changer
{
    public partial class BGChangerWindowMain : Form
    {
        public BGChangerWindowMain()
        {
            InitializeComponent();
        }

        #region Hotkey DLL
        [DllImport("user32.dll")]
        private static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vk);

        [DllImport("user32.dll")]
        private static extern bool UnregisterHotKey(IntPtr hWnd, int id);

        const int MOD_CONTROL = 0x0002;
        const int MOD_SHIFT = 0x0004;
        const int WM_HOTKEY = 0x0312;
        #endregion



        bool safeBg = false;
        bool closepls = false;


        private void Form1_Load(object sender, EventArgs e)
        {
            if (!Directory.Exists(@"bg\")) Directory.CreateDirectory(@"bg\");


            if (!Existant())
                MessageBox.Show("At least one Image is missing!\nPlease add each Image before continuing.", "Fatalaty", MessageBoxButtons.OK, MessageBoxIcon.Stop);
            else if (Existant() && Properties.Settings.Default.setSafe)
                changeBg(false);

            checkBoxSetSafe.Checked = Properties.Settings.Default.setSafe;
            //
            //Registering Hotkey
            //

            RegisterHotKey(this.Handle, 1, MOD_CONTROL + MOD_SHIFT, (int)Keys.D);

            //
            //Hide yo kids, hide yo wife, hide yo program
            //
            this.Hide();
        }

        private bool Existant()
        {
            if (File.Exists(@"bg\safe.png"))
                using (System.IO.Stream s = new System.Net.WebClient().OpenRead(@"bg\safe.png"))
                {
                    System.Drawing.Image img = System.Drawing.Image.FromStream(s);
                    pictureBoxSafe.BackgroundImage = img;
                }
            else
                return false;
            if (File.Exists(@"bg\lewd.png"))
                using (System.IO.Stream s = new System.Net.WebClient().OpenRead(@"bg\lewd.png"))
                {
                    System.Drawing.Image img = System.Drawing.Image.FromStream(s);
                    pictureBoxLewd.BackgroundImage = img;
                }
            else
                return false;

            return true;
        }


       protected override void WndProc(ref Message m)
        {
            if (m.Msg == WM_HOTKEY)
                changeBg(false);
            base.WndProc(ref m);
        }

       private void changeBg(bool changeAlways)
       {
           if (!Existant())
               return;

           Uri safe = new System.Uri(Application.StartupPath + @"\bg\safe.png");
           Uri lewd = new System.Uri(Application.StartupPath +@"\bg\lewd.png");

           if (safeBg && (!checkBoxSafeChange.Checked || changeAlways))
           {
               Wallpaper.Set(lewd, Wallpaper.Style.Tiled);
               safeBg = false;
               labelLewdActive.Visible = true;
               labelSafeActive.Visible = false;
           }
           else
           {
               Wallpaper.Set(safe, Wallpaper.Style.Tiled);
               safeBg = true;
               labelLewdActive.Visible = false;
               labelSafeActive.Visible = true;
           }

       }


        private void closeToolStripMenuItem_Click(object sender, EventArgs e)
        {
            closepls = true;
            this.Close();
        }

        private void changeBackgroundToolStripMenuItem_Click(object sender, EventArgs e)
        {
            changeBg(true);
        }

        private void settingsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Show();
        }

        private void Form1_FormClosing_1(object sender, FormClosingEventArgs e)
        {
            if (!closepls)
                e.Cancel = true;
            else
                UnregisterHotKey(this.Handle, 1);
            this.Hide();

        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.Hide();
        }

        private void buttonCloseProgram_Click(object sender, System.EventArgs e)
        {
            closepls = true;
            this.Close();
        }

        private void buttonChangeSafe_Click(object sender, System.EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
                using (System.IO.Stream s = new System.Net.WebClient().OpenRead(openFileDialog1.FileName))
                {
                    System.Drawing.Image img = System.Drawing.Image.FromStream(s);
                    pictureBoxSafe.BackgroundImage = img;
                    if (File.Exists(@"bg\safe.png")) File.Delete(@"bg\safe.png");
                    File.Copy(openFileDialog1.FileName, @"bg\safe.png");
                }
            else
                return;
        }

        private void buttonChangeLewd_Click(object sender, System.EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
                using (System.IO.Stream s = new System.Net.WebClient().OpenRead(openFileDialog1.FileName))
                {
                    System.Drawing.Image img = System.Drawing.Image.FromStream(s);
                    pictureBoxLewd.BackgroundImage = img;
                    if (File.Exists(@"bg\lewd.png")) File.Delete(@"bg\lewd.png");
                    File.Copy(openFileDialog1.FileName, @"bg\lewd.png");
                }
            else
                return;
        }

        private void buttonChangeBG_Click(object sender, System.EventArgs e)
        {
            changeBg(true);
        }

        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            this.Show();
        }


        private void checkBox1_CheckedChanged(object sender, System.EventArgs e)
        {
            Properties.Settings.Default.setSafe = checkBoxSetSafe.Checked;
            Properties.Settings.Default.Save();
        }

    }
}