http://bugs.winehq.org/show_bug.cgi?id=30365
--- Comment #2 from Sagawa sagawa.aki+winebugs@gmail.com 2012-09-03 08:59:29 CDT --- Regarding "\036" and "\037" notation, I found information.
In detail, the book, "Inside Win/V" (ISBN 4-89052-504-1), describes this notation. The meaning is as same as what I guessed. This notation was used for Katakana access keys in Windows 3.x Japanese Edition. And we can switch which way of access key, alphabet or Katakana, should be used in the keyboard applet, Control Panel. Katakana access key feature was removed in Windows 95 age. Close to 100% of currently available software use normal "&" notation for access keys. But this notation is still valid in Windows 7 and only used by alphabetical access keys.