[PATCH 4/8] user32: Use UNICODE_STRING for passing window classes internally.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  dlls/user32/class.c    | 162 +++++++++++++++++++++++------------------
  dlls/user32/controls.h |   2 +-
  dlls/user32/win.c      |  24 ++++--
  3 files changed, 109 insertions(+), 79 deletions(-)