Re: [PATCH v9 0/2] MR6218: comctl32/treeview: Allow treeview parent to deny treeview expansion.

[Zhiyi Zhang (＠zhiyi)]

Zhiyi Zhang (@zhiyi) commented about dlls/comctl32/tests/treeview.c:
> DestroyWindow(hTree);
>
> +    /* check that expansion can be denied by parent */
> +    hTree = create_treeview_control(0);
> +    fill_tree(hTree);
> +
> +    g_reject_tvn_itemexpanding = 1;
> +    memset(&item, 0, sizeof(item));
> +    item.mask = TVIF_STATE;
> +    item.hItem = hRoot;
> +    *((HTREEITEM *)&rc) = item.hItem;
> +
> +    /* Simulate the double-click */

I think using the TVM_EXPAND message to expand or collapse the item is more reliable than sending a click. Also, please test that TVN_ITEMEXPANDINGA returning TRUE can also prevent the item from collapsing.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/6218#note_78547