[Bug 14350] SetClassLongW() to subclass window EDIT control Problem

http://bugs.winehq.org/show_bug.cgi?id=14350

--- Comment #2 from Hongbo Ni   2008-07-08 07:39:42 ---
UNICODE is not defined because it's a ANSI (non-unicode) MFC application.

So all Edit windows (include on About dialog) are created by CreateWindowExA.
The problem is after subclassing the Edit class with a Unicode ProcW, any
window created by CreateWindowExA will become a Unicode window on Wine, not on
windowz.

I checked wine souce, when built-in Edit control class is registered, it has
ProcA and ProcW, so if you create a Edit window with CreateWindowExA, it will
be ANSI, if you create a Edit window with CreateWindowExW, it will be Unicode.
This behaviour is same on wine and windows.

But in WINE, after we subclass Edit class with 
SetClassLongW(hEditWnd1, GCL_WNDPROC,(DWORD)EditWndProcW);

The Edit Control only have one ProcW, ProcA is set to NULL. 
------class.c line 908 --------------------------------
    case GCLP_WNDPROC:
        retval = (ULONG_PTR)WINPROC_GetProc( class->winproc, unicode );
        class->winproc = WINPROC_AllocProc( unicode ? NULL : (WNDPROC)newval,
                                            unicode ? (WNDPROC)newval : NULL );
        break;
-------------------------------------------------------

Now regardless you call CreateWindowExA or CreateWindowExW, the created window
will be Unicode.

This wine behaviour is different from Windows, where even after Edit class is
subclass with SetClassLongW(hEditWnd1, GCL_WNDPROC,(DWORD)EditWndProcW);

CreateWindowExA still create ANSI window, CreateWindowExW creates Unciode
Windows. (EditWndProcW needs to handle both message from Ansi and Unicode edit
windows).