From d3135bef8ee7bb8c81f7db0a7ba777b6b350babe Mon Sep 17 00:00:00 2001
From: "Namhyeon, Go" <gnh1201@gmail.com>
Date: Sun, 23 Mar 2025 14:43:23 +0900
Subject: [PATCH] Add the mutex to avoid redundant

---
 WelsonJS.Toolkit/WelsonJS.Launcher/MainForm.cs |  2 ++
 WelsonJS.Toolkit/WelsonJS.Launcher/Program.cs  | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/WelsonJS.Toolkit/WelsonJS.Launcher/MainForm.cs b/WelsonJS.Toolkit/WelsonJS.Launcher/MainForm.cs
index d9680a3..148c966 100644
--- a/WelsonJS.Toolkit/WelsonJS.Launcher/MainForm.cs
+++ b/WelsonJS.Toolkit/WelsonJS.Launcher/MainForm.cs
@@ -38,6 +38,7 @@ namespace WelsonJS.Launcher
             {
                 e.Cancel = true;
                 this.Hide();
+                this.ShowInTaskbar = false;
                 notifyIcon1.Visible = true;
             }
             base.OnFormClosing(e);
@@ -47,6 +48,7 @@ namespace WelsonJS.Launcher
         {
             this.Show();
             this.WindowState = FormWindowState.Normal;
+            this.ShowInTaskbar = true;
             this.Focus();
             notifyIcon1.Visible = false;
         }
diff --git a/WelsonJS.Toolkit/WelsonJS.Launcher/Program.cs b/WelsonJS.Toolkit/WelsonJS.Launcher/Program.cs
index 8ace81e..3fc9c6d 100644
--- a/WelsonJS.Toolkit/WelsonJS.Launcher/Program.cs
+++ b/WelsonJS.Toolkit/WelsonJS.Launcher/Program.cs
@@ -2,6 +2,7 @@
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
+using System.Threading;
 using System.Windows.Forms;
 using WelsonJS.Launcher.Tools;
 
@@ -9,14 +10,24 @@ namespace WelsonJS.Launcher
 {
     internal static class Program
     {
+        static Mutex mutex;
         public static ResourceServer resourceServer;
 
         [STAThread]
         static void Main()
         {
+            mutex = new Mutex(true, "WelsonJS.Launcher.Mutex", out bool isMutexNotExists);
+            if (!isMutexNotExists)
+            {
+                MessageBox.Show("WelsonJS Launcher already running.");
+                return;
+            }
+
             Application.EnableVisualStyles();
             Application.SetCompatibleTextRenderingDefault(false);
             Application.Run(new MainForm());
+
+            mutex.ReleaseMutex();
         }
 
         public static void RunCommandPrompt(string workingDirectory, string entryFileName, string scriptName, bool isConsoleApplication = false, bool isInteractiveServiceAapplication = false)