[Bug 41201] New: Installer of Thunder Speed: Shadow window covers the real window.

https://bugs.winehq.org/show_bug.cgi?id=41201

Bug ID: 41201
           Summary: Installer of Thunder Speed: Shadow window covers the
                    real window.
           Product: Wine
           Version: 1.9.17
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 55442
  --> https://bugs.winehq.org/attachment.cgi?id=55442
log with relay,win,x11drv.

Reproduce:
$ wine ThunderSpeed1.0.34.360.exe
And you will see there is a blank window and you can use 'atl+tab' to switch to
the real window.

This bug can't be reproduced on macOS, so I think it is a bug of winex11.drv.
It may be a bug of layered window, the installer uses UpdateLayeredWindow() to
implement it.

And this bug also can be reproduced by a UpdateLayeredWindow() demo from this
page:
http://www.codeproject.com/Articles/42032/Perfect-Semi-transparent-Shaped-Di...

When you run GirlDialog.exe you will find button was covered by that picture.