[Bug 43124] New: FlashWindowEx: WM_NCACTIVATE behavior is incorrect

https://bugs.winehq.org/show_bug.cgi?id=43124

Bug ID: 43124
           Summary: FlashWindowEx: WM_NCACTIVATE behavior is incorrect
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 58328
  --> https://bugs.winehq.org/attachment.cgi?id=58328
FlashWindowEx dwFlags parameter tests

Depending on the dwFlags parameter, FlashWindowEx may send a WM_NCACTIVATE
message with the wrong wParam value. Some flags should not send a WM_NCACTIVATE
message at all.

Attached is a document I've made from testing FlashWindowEx with various flags
and having the window active/inactive.

This issue seems to be related to Overwatch losing focus on respawn, it calls
FlashWindowEx with dwFlags = 0xE (FLASHW_TIMERNOFG + FLASHW_TRAY), which
according to my tests should send a WM_NCACTIVATE message with 1, but wine
sends 0 instead. Forcing FlashWindowEx to send TRUE instead did resolve the
loss of focus.