[Bug 56431] Dotnet TreeView disappearing plus-sign

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56431

--- Comment #26 from [e-mail] ---
Phew the problem is more complex than I thought.
The solution could not be to delete TREEVIEW_SendExpanded(), because it is
needed to update the treeview itself... (I think the method name is a little
bit confusing here... :/)

TREEVIEW_SendTreeviewNotify() is called within TREEVIEW_SendExpanded() and it
seems there is a timing problem... but I have no clue why :/

Within TREEVIEW_SendTreviewNotify() this method is called, and after that the
children variable is set to 0!

if (newItem)
        TREEVIEW_TVItemFromItem(infoPtr, mask, &nmhdr.itemNew, newItem);

If I surrend this call with Trace messages the issue do not happen...
(timing!?)

if (newItem)
        TRACE("Before TREEVIEW_TVItemFromItem: cChildren=%d\n",
newItem->cChildren);
        TREEVIEW_TVItemFromItem(infoPtr, mask, &nmhdr.itemNew, newItem);
        TRACE("After TREEVIEW_TVItemFromItem: cSChildren=%d\n",
nmhdr.itemNew.cChildren);

I think I have to look into it in more detail.
Maybe I should try to setup an debugger to be able to set breakpoints.