We migrate from WinForms to WPF… slowly =)
No we use WPF User Controls with ElementHost.
Is it possible to define application wide resources in this context? In pure WPF Application.Resources stands for it. But there’s no WPF App when integrating with WinForms.
You can use a WPF application object even if your project is a WinForms one with a few separate WPF forms or controls. The object won’t be precreated for you, but if you manually create it, simply by
new App()(or even without a derived class,new System.Windows.Application()), everything in your project will see it.