https://bugs.winehq.org/show_bug.cgi?id=29871
--- Comment #86 from Chituc Georgian dianaxxyyzz@gmail.com --- you can check this :
if (strstr ( debugstr_w(className) , "OWL." ) != NULL ) {
if( ( cs->style & WS_POPUP ) && ( cs->style & WS_CLIPSIBLINGS ) ) { cs->style |= WS_SYSMENU ;
cs->dwExStyle |= WS_EX_TOOLWINDOW;
}
}
Is just for testing not a proper fix , but for cs 6 it works in a way