Pass secondary args to launched app

UWPHook/AppManager.cs

@@ -20,14 +20,23 @@ namespace UWPHook
         /// Launch a UWP App using a ApplicationActivationManager and sets a internal id to launched proccess id
         /// </summary>
         /// <param name="aumid">The AUMID of the app to launch</param>
-        public static void LaunchUWPApp(string aumid)
+        public static void LaunchUWPApp(string[] args)
         {
+            string aumid = args[1]; // We receive the args from Steam, 
+                                    // 0 is application location, 
+                                    // 1 is the aumid, the rest are extras
+
             var mgr = new ApplicationActivationManager();
             uint processId;
 
+            string extra_args = String.Join(" ", args.Skip(2)
+                                                 .Take(args.Length - 2)
+                                                 .Select(eachElement => eachElement.Clone()
+                                            ).ToArray());
+
             try
             {
-                mgr.ActivateApplication(aumid, null, ActivateOptions.None, out processId);
+                mgr.ActivateApplication(aumid, extra_args, ActivateOptions.None, out processId);
                 
                 //Bring the launched app to the foreground, this fixes in-home streaming
                 id = (int)processId;

UWPHook/GamesWindow.xaml.cs

@@ -32,14 +32,15 @@ namespace UWPHook
         {
             InitializeComponent();
             Apps = new AppEntryModel();
+            var args = Environment.GetCommandLineArgs();
 
             //If null or 1, the app was launched normally
-            if (Environment.GetCommandLineArgs() != null)
+            if (args != null)
             {
                 //When length is 1, the only argument is the path where the app is installed
                 if (Environment.GetCommandLineArgs().Length > 1)
                 {
-                    _ = LauncherAsync();
+                    _ = LauncherAsync(args);
                 }
             }
         }
@@ -53,7 +54,7 @@ namespace UWPHook
             await Task.Delay(10000);
         }
 
-        private async Task LauncherAsync()
+        private async Task LauncherAsync(string[] args)
         {
             FullScreenLauncher launcher = null;
             //So, for some reason, Steam is now stopping in-home streaming if the launched app is minimized, so not hiding UWPHook's window is doing the trick for now
@@ -86,7 +87,7 @@ namespace UWPHook
                 }
 
                 //The only other parameter Steam will send is the app AUMID
-                AppManager.LaunchUWPApp(Environment.GetCommandLineArgs()[1]);
+                AppManager.LaunchUWPApp(args);
 
                 //While the current launched app is running, sleep for n seconds and then check again
                 while (AppManager.IsRunning())