[Bug 5884] VB6 application fails to convert date to string formatted weekdays

http://bugs.winehq.org/show_bug.cgi?id=5884

--- Comment #11 from Alex Balut   2007-11-29 23:28:05 ---
Created an attachment (id=9404)
 --> (http://bugs.winehq.org/attachment.cgi?id=9404)
Made minor corrections to the patch and added a test

I made some minor corrections to the 20070702 patch, added some more comments
and added a test.

The test checks:
- some valid/invalid arguments
- some arguments should return the same result
- the full weekday names start with the abbreviated form

VarWeekdayName provides values that depend on the locale; the test does not
check the returned values to match any (hardcoded) values. We could extend the
test to set a specific locale and check that the values match, but I think it's
good as it is.