Recreating PerMonitor sample in VB.NET requires "Enable themes" to be uncommented to fire DpiChanged event #37

I'm trying to create this sample in VB.Net, in order to figure out how to take advantage of the DpiChanged event.

Steps to reproduce:

1. Create new VB.Net Winforms application, targeting 4.7
2. Add DpiAwareness key to app.config
3. Uncomment Win 10 supportedOS in app.manifest
4. In design mode for Form1, double-click the DpiChanged event entry to create the event body in the code behind.
5. Put a breakpoint on the event and run the app
6. Drag the window between two monitors with different Dpi scaling set.

The event will not fire until the "Enable themes" section is uncommented in the manifest, which is not required in the C# version given.

Any idea why this is?