[PATCH 2/2] comctl32/listbox: Implement LBS_NODATA

[Nikolay Sivov]

On 11/19/18 6:33 PM, Gabriel Ivăncescu wrote:

> I forgot to mention: besides the bug report, a real life use case at
> least for single-selection listboxes is Wine's own autocomplete
> implementation in the very near future.
>
> I plan to convert it to use LBS_NODATA (once it's implemented) for a
> 40% performance gain on large suggestions, so that it is much more
> manageable on a large enumeration (virtual database fs for instance).
>
> Obviously it has to be implemented first or there's no point at all.
> (and yes, the "special cases" everywhere needs to remain for
> single-selection listboxes)

Is this listbox window accessible by some API? If it's visible to 
application in any way you should check first that it's actually using 
this style.