Add ImmersiveShellHelper

src/ManagedShell.Common/Helpers/EnvironmentHelper.cs

@@ -109,6 +109,19 @@ public static bool IsWindows10RS4OrBetter
             }
         }
 
+        public static bool IsWindows1020H1OrBetter
+        {
+            get
+            {
+                if (osVersionMajor == 0)
+                {
+                    getOSVersion();
+                }
+
+                return (osVersionMajor >= 10 && osVersionBuild >= 19041);
+            }
+        }
+
         public static bool IsWindows11OrBetter
         {
             get
@@ -135,6 +148,19 @@ public static bool IsWindows1122H2OrBetter
             }
         }
 
+        public static bool IsWindows1124H2OrBetter
+        {
+            get
+            {
+                if (osVersionMajor == 0)
+                {
+                    getOSVersion();
+                }
+
+                return (osVersionMajor >= 10 && osVersionBuild >= 26100);
+            }
+        }
+
         public static bool IsWindows10DarkModeSupported
         {
             get

src/ManagedShell.Interop/NativeMethods.ShlwApi.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Runtime.InteropServices;
+using System.Text;
 
 namespace ManagedShell.Interop
 {
@@ -18,5 +19,8 @@ public partial class NativeMethods
 
         [DllImport(ShlwApi_DllName, SetLastError = true)]
         public static extern bool SHUnlockShared(IntPtr pvData);
+
+        [DllImport(ShlwApi_DllName, BestFitMapping = false, CharSet = CharSet.Unicode, ExactSpelling = true, SetLastError = false, ThrowOnUnmappableChar = true)]
+        public static extern int SHLoadIndirectString(string pszSource, StringBuilder pszOutBuf, int cchOutBuf, IntPtr ppvReserved);
     }
 }