Add Missing #if WINAPPSDK

Author: ghost1372

components/TitleBar/src/InfoHelper.cs

@@ -1,4 +1,5 @@
-using Windows.ApplicationModel;
+#if WINAPPSDK
+using Windows.ApplicationModel;
 using Windows.Storage;
 using Windows.System.Profile;
 
@@ -32,3 +33,4 @@ static InfoHelper()
             );
     }
 }
+#endif

components/TitleBar/src/NativeMethods.cs

@@ -1,4 +1,5 @@
-using System.Runtime.InteropServices;
+#if WINAPPSDK
+using System.Runtime.InteropServices;
 
 namespace CommunityToolkit.WinUI.Controls;
 internal static class NativeMethods
@@ -82,3 +83,4 @@ public static IntPtr SetWindowLongAuto(IntPtr hWnd, int nIndex, IntPtr dwNewLong
     [DllImport("user32.dll")]
     public static extern IntPtr CallWindowProc(IntPtr lpPrevWndFunc, IntPtr hWnd, WindowMessage Msg, IntPtr wParam, IntPtr lParam);
 }
+#endif

components/TitleBar/src/WndProcHelper.cs

@@ -1,4 +1,5 @@
-using System.Runtime.InteropServices;
+#if WINAPPSDK
+using System.Runtime.InteropServices;
 using WinRT.Interop;
 
 namespace CommunityToolkit.WinUI.Controls;
@@ -47,3 +48,4 @@ public void RegisterInputNonClientPointerSourceWndProc(WNDPROC wndProc)
         }
     }
 }
+#endif