[Bug 43146] gtkmm hello world program can't show window

https://bugs.winehq.org/show_bug.cgi?id=43146

--- Comment #3 from Sebastian Lackner  ---
Please use attachments instead of pasting large terminal output into the
comment field. Based on your terminal output:

--- snip ---
fixme:module:load_dll Loader redirect from L"uxtheme.dll" to L"uxtheme-gtk.dll"
fixme:uxthemegtk:load_gtk3_libs Wine cannot find the libgtk-3.so.0 library.
--- snip ---

First of all, try to install the missing library. If it still doesn't work, try
to disable the experimental GTK theming support. It is highly experimental and
has nothing to do with GTK used by Windows applications.