windows: fix the event loop not waking on accessibility requests

Fixes #4055.

src/changelog/unreleased.md

@@ -200,3 +200,4 @@ changelog entry.
 - On macOS, fixed the scancode conversion for audio volume keys.
 - On macOS, fixed the scancode conversion for `IntlBackslash`.
 - On macOS, fixed redundant `SurfaceResized` event at window creation.
+- On Windows, fixed the event loop not waking on accessibility requests.

src/platform_impl/windows/event_loop.rs

@@ -43,7 +43,7 @@ use windows_sys::Win32::UI::WindowsAndMessaging::{
     GetMenu, LoadCursorW, MsgWaitForMultipleObjectsEx, PeekMessageW, PostMessageW,
     RegisterClassExW, RegisterWindowMessageA, SetCursor, SetWindowPos, TranslateMessage,
     CREATESTRUCTW, GWL_STYLE, GWL_USERDATA, HTCAPTION, HTCLIENT, MINMAXINFO, MNC_CLOSE, MSG,
-    MWMO_INPUTAVAILABLE, NCCALCSIZE_PARAMS, PM_REMOVE, PT_TOUCH, QS_ALLEVENTS, RI_MOUSE_HWHEEL,
+    MWMO_INPUTAVAILABLE, NCCALCSIZE_PARAMS, PM_REMOVE, PT_TOUCH, QS_ALLINPUT, RI_MOUSE_HWHEEL,
     RI_MOUSE_WHEEL, SC_MINIMIZE, SC_RESTORE, SIZE_MAXIMIZED, SWP_NOACTIVATE, SWP_NOMOVE,
     SWP_NOSIZE, SWP_NOZORDER, WHEEL_DELTA, WINDOWPOS, WMSZ_BOTTOM, WMSZ_BOTTOMLEFT,
     WMSZ_BOTTOMRIGHT, WMSZ_LEFT, WMSZ_RIGHT, WMSZ_TOP, WMSZ_TOPLEFT, WMSZ_TOPRIGHT,
@@ -736,11 +736,12 @@ fn wait_for_messages_impl(
         let (num_handles, raw_handles) =
             if use_timer { (1, [high_resolution_timer.unwrap()]) } else { (0, [ptr::null_mut()]) };
 
+        // We must use `QS_ALLINPUT` to wake on accessibility messages.
         let result = MsgWaitForMultipleObjectsEx(
             num_handles,
             raw_handles.as_ptr() as *const _,
             wait_duration_ms,
-            QS_ALLEVENTS,
+            QS_ALLINPUT,
             MWMO_INPUTAVAILABLE,
         );
         if result == WAIT_FAILED {