Re: [PATCH v12 0/2] MR6218: comctl32/treeview: Allow treeview parent to deny treeview expansion.

[Zhiyi Zhang (＠zhiyi)]

> TVE_COLLAPSE | TVE_COLLAPSERESET doesn't seem to work either.

That's weird. I tried sending TVM_EXPAND with TVE_COLLAPSE and TVE_EXPAND with control spy and they work as expected. Could you double-check? Does TVE_TOGGLE work? Also, could you try to use PostMessage(TVM_EXPAND, TVE_COLLAPSE) and then call flush_events()?
> I could try resetting the flag manually, although it does say it will result in unpredictable behavior.

Let's not do that then.