Vista MessageBox

It is odd that the message box uses the 2000 theme. Is the rest of your app using the Vista theme? You can make it use any schema you want though by overriding the contect template for the control.

Hello, WPF MessageBox uses Win32 MessageBox. That means, it doesn’t use WPF themes. The same goes with other common dialogs such as OpenFileDialog. To enable aero theme on those Win32 dialogs, you need to add a manifest file to your application, and add the following:

<dependency>

<dependentAssembly>

<assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="x86" publicKeyToken="6595b64144ccf1df" language="*"></assemblyIdentity>

</dependentAssembly>

</dependency>

Now rebuild your application and run it, your MessageBox should have aero theme. But when you debugging the application, the aero theme seems still not be applied to common dialogs. Only when running the application without debugging will it be applied.

Will the application still work under XP then?