The accelerator table of the top-level window active, or null.
The message loop calls this each iteration with GetActiveWindow() so menu
shortcuts are scoped to whichever window is active — in a multi-window app
each window's shortcuts work only while it is focused, rather than the last
window to attach a menu owning the shortcuts for all of them.
The accelerator table of the top-level window active, or null.
The message loop calls this each iteration with GetActiveWindow() so menu shortcuts are scoped to whichever window is active — in a multi-window app each window's shortcuts work only while it is focused, rather than the last window to attach a menu owning the shortcuts for all of them.