[Bug 7512] Problem with unicode comboboxes

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=7512

------- Additional Comments From [e-mail]  2007-11-07 10:38 -------
There is no need to provide the same code snippet again and again, this bug
is full of such examples, and Wine has a couple of nice test cases as well.

The problem is not whether the control is unicode or not, IsWindowUnicode()
works correctly in Wine. The problem is (as explained already numerous times
in this bug) that an app sets a windows proc (which expects ANSI input strings)
as a Unicode window proc handler. That causes unexpected string conversions
leading to the observed behavior. Apparently Windows detects such a case for
internal window procs and uses not provided (broken) ANSI window proc, but
its Unicode counterpart.