Sven Baars (@sbaars) commented about dlls/user32/dialog.c:
if (template.style & WS_VISIBLE && !(GetWindowLongW( hwnd, GWL_STYLE ) & WS_VISIBLE)) { NtUserShowWindow( hwnd, SW_SHOWNORMAL ); /* SW_SHOW doesn't always work */
The indentation looks a bit awkward now.