http://bugs.winehq.org/show_bug.cgi?id=33952
Nikolay Sivov bunglehead@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Summary|Focus rectangle is drawn on |Focus rectangle and |Windows Calc buttons |accelerators are always | |visible for builtin | |controls (and comctl32)
--- Comment #1 from Nikolay Sivov bunglehead@gmail.com 2013-07-04 10:08:08 CDT --- This is not limited to comctl32 actually, it involves user32 too. There's a set of messages that control appearance of accelerator letters and focus rectangle, it's configurable in Windows, so you're able to revert to pre-win2000 behaviour when both accelerators and focus rectangle are always visible.
Here it's described how it works - http://blogs.msdn.com/b/oldnewthing/archive/2005/05/03/414317.aspx - not sure how accurate it is, but anyway.