[PATCH 0/7] MR8566: comctl32: Implement OBJID_QUERYCLASSNAMEIDX for remaining controls.

[Esme Povirk (＠madewokherd)]

The header controls are a bit weird. It seems v6 returns 0 for this, but unlike v5 it has its own IAccessible implementation. Since Wine doesn't have that yet, and we can't easily change behavior based on version, I think it makes sense to return a value.