[PATCH 0/2] MR6218: comctl32/treeview: Allow treeview parent to deny treeview expansion.

[Jacob Czekalla (＠JacobCzekalla)]

When the listview expands or collapses an item it notifies the parent using the TVN_ITEMEXPANDING message. The parent can return true on this message and it prevents the treeview from expanding or collapsing the item. WINE does not let you deny TVN_ITEMEXPANDING by returning true.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53727