Re: [PATCH v11 0/2] MR6218: comctl32/treeview: Allow treeview parent to deny treeview expansion.

[Zhiyi Zhang (＠zhiyi)]

On Thu Aug 15 13:12:12 2024 +0000, Jacob Czekalla wrote:
> I tried sending TVE_COLLAPSE, but it didn't work because of the
>  TVIS_EXPANDEDONCE flag. The TVN_ITEMEXPANDING message was not getting sent.

Have you tried TVE_COLLAPSE | TVE_COLLAPSERESET? See https://learn.microsoft.com/en-us/windows/win32/controls/tree-view-control-i... regarding TVIS_EXPANDEDONCE