http://bugs.winehq.org/show_bug.cgi?id=8692
------- Additional Comments From mikolaj.zalewski@gmail.com 2007-19-07 08:13 ------- The ISF_Desktop_fnGetUIObjectOf should return the correct context menu for the extension. But I don't remember if the context menu for shell namespaces is provided only by that namespace (then you need only to load the provided IContextMenu) or if it is created by merging items from the parent folder, the item (i.e. the namespace) and the browser (e.g. explorer or the Open dialog). If it's the second option then you might find that the foundations in wine shell32 are wrong and would require some changes.
The fact that the Properties option is missing in shv_item_cmenu.c is not a problem because that's the menu for regular files and folders.