Use the Microsoft.Windows.Common-Controls 6.0 style for LegacyMessageBox in gallery app #153

Author: ghost1372

dev/DevWinUI.Gallery/app.manifest

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
   <assemblyIdentity version="1.0.0.0" name="DevWinUIGallery.app"/>
 
@@ -16,4 +16,16 @@
       <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2</dpiAwareness>
     </windowsSettings>
   </application>
-</assembly>
+
+  <dependency>
+	<dependentAssembly>
+		<assemblyIdentity
+			type="win32"
+			name="Microsoft.Windows.Common-Controls"
+			version="6.0.0.0"
+			processorArchitecture="*"
+			publicKeyToken="6595b64144ccf1df"
+			language="*" />
+	</dependentAssembly>
+  </dependency>	
+</assembly>