The single window procedure shared by all Deft window classes.
extern(Windows) callbacks must not let a D exception escape into the OS, so the dispatch is wrapped: any Throwable is swallowed and the message falls through to DefWindowProcW.
See Implementation
The single window procedure shared by all Deft window classes.
extern(Windows) callbacks must not let a D exception escape into the OS, so the dispatch is wrapped: any Throwable is swallowed and the message falls through to DefWindowProcW.