[Bug 54305] New: riched20:editor - test_eventMask() sometimes gets the wrong event mask (0) on Windows 7

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54305

Bug ID: 54305
           Summary: riched20:editor - test_eventMask() sometimes gets the
                    wrong event mask (0) on Windows 7
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: richedit
          Assignee: [e-mail]
          Reporter: [e-mail]

riched20:editor - test_eventMask() sometimes gets the wrong event mask (0) on
Windows 7:

editor.c:6663: Test failed: wrong event mask (0x0) during WM_COMMAND

See https://test.winehq.org/data/patterns.html#riched20:editor

This looks like a race condition between making the windows visible again and
querying the event mask, even though we check that IsWindowVisible() returns
true.