helper method to set app id

src/Squirrel/NativeMethods.cs

@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace Squirrel
 {
-    public static class NativeMethods
+    internal static class NativeMethods
     {
         public static int GetParentProcessId()
         {
@@ -31,6 +31,9 @@ namespace Squirrel
             return (int) pbi.InheritedFromUniqueProcessId;
         }
 
+        [DllImport("shell32.dll", SetLastError = true)]
+        public static extern void SetCurrentProcessExplicitAppUserModelID([MarshalAs(UnmanagedType.LPWStr)] string AppID);
+
         [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
         public static extern IntPtr LoadLibraryEx(string lpModuleName, IntPtr hFile, uint dwFlags);
 

src/Squirrel/UpdateManager.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Diagnostics.Contracts;
@@ -146,6 +146,21 @@ namespace Squirrel
             return appDirName.ToSemanticVersion();
         }
 
+        public void SetProcessAppUserModelId()
+        {
+            var releases = Utility.LoadLocalReleases(Utility.LocalReleaseFileForAppDir(rootAppDirectory));
+            var thisRelease = Utility.FindCurrentVersion(releases);
+
+            var zf = new ZipPackage(Path.Combine(
+                Utility.PackageDirectoryForAppDir(rootAppDirectory),
+                thisRelease.Filename));
+
+            var exeName = Path.GetFileName(AssemblyRuntimeInfo.EntryExePath);
+
+            var appUserModelId = String.Format("com.squirrel.{0}.{1}", zf.Id.Replace(" ", ""), exeName.Replace(".exe", "").Replace(" ", ""));
+            NativeMethods.SetCurrentProcessExplicitAppUserModelID(appUserModelId);
+        }
+
         public void KillAllExecutablesBelongingToPackage()
         {
             var installHelpers = new InstallHelperImpl(applicationName, rootAppDirectory);