[Bug 1486] Dynamically created menus do not work in Delphi apps

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=1486





------- Additional Comments From hallo(a)michael-kaufmann.ch  2004-05-09 10:25 -------
I've hunted this bug for many hours and now I've squeezed it :-)

The cause of this bug is that Delphi calls DestroyMenu while the menu is still
visible. If you change a property of a TMenuItem (e.g. "Visible"), Delphi
rebuilds the whole menu. And it destroys the old one while it is still visible.
This is also a Delphi bug, because it's not documented what should happen in
this situation.

Windows 9x destroys the menu immediately and sets the window's menu handle to
NULL. Windows 2000 destroys the menu as soon as it's not used anymore. WINE
destroyed the menu, but didn't tell that to the window showing the menu.

It was very hard to find this bug, because WINE gave the new menu the same menu
handle as the old one. Delphi then thought that there was still a menu there,
and didn't call SetMenu. Because of this, the menu was not initialized properly.

I've submitted a patch:
http://www.winehq.com/hypermail/wine-patches/2004/09/0074.html

Now all our beloved Delphi apps should run flawlessly again :-)

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