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

wine-bugs at winehq.org wine-bugs at winehq.org
Tue Jul 8 08:15:21 CDT 2008


--- Comment #3 from Hongbo Ni <hongbo at njstar.com>  2008-07-08 08:15:21 ---
I suspect this is how micrsoft window works regarding to
  SetClassLongW(hEditWnd, GCL_WNDPROC,(DWORD)EditWndProc);

------/user32/class.c line 910 in CLASS_SetClassLong() ----------
+ if (the class of hEditWnd has both ProcA and ProcW) {
+   class->winproc = WINPROC_AllocProc((WNDPROC)newval,(WNDPROC)newval);
+ }else{
    class->winproc = WINPROC_AllocProc( unicode ? NULL : (WNDPROC)newval,
                                        unicode ? (WNDPROC)newval : NULL );
+ }

This means if you subclass a built-in class with 
the Proc provided must be able to handle both ANSI and Unicode Edit Msg.

This is what I have done in my EditWndProc using IsWindowUnicode() to
distingush ANSI or Unicode Windows message.

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