Try add forms for settings

DD2Switcher/Form1.cs

@@ -1,9 +1,60 @@
-using System.Windows.Forms;
+using System;
+using System.Windows.Forms;
 
 namespace DD2Switcher {
     public partial class Form1 : Form {
+        private SettingsForm settingsForm;
+
         public Form1() {
             InitializeComponent();
+            LoadIcons();
+            this.Load += Form1_Load;
+        }
+
+        private void Form1_Load(object sender, EventArgs e) {
+            // Hide the form initially since we're running in system tray
+            this.Hide();
+        }
+
+        private void notifyIcon_MouseDoubleClick(object sender, MouseEventArgs e) {
+            ShowSettings();
+        }
+
+        private void settingsMenuItem_Click(object sender, EventArgs e) {
+            ShowSettings();
+        }
+
+        private void exitMenuItem_Click(object sender, EventArgs e) {
+            Application.Exit();
+        }
+
+        private void Form1_FormClosing(object sender, FormClosingEventArgs e) {
+            // Prevent the form from closing, just hide it
+            if (e.CloseReason == CloseReason.UserClosing) {
+                e.Cancel = true;
+                this.Hide();
+            }
+        }
+
+        private void ShowSettings() {
+            if (settingsForm == null || settingsForm.IsDisposed) {
+                settingsForm = new SettingsForm();
+            }
+
+            settingsForm.Show();
+            settingsForm.BringToFront();
+        }
+
+        private void LoadIcons() {
+            try {
+                string iconPath = System.IO.Path.Combine(
+                    System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location),
+                    "app.ico");
+                this.Icon = new System.Drawing.Icon(iconPath);
+                this.notifyIcon.Icon = new System.Drawing.Icon(iconPath);
+            } catch {
+                // Use default icon if custom icon not found
+            }
         }
     }
 }