Jacek Caban (@jacek) commented about dlls/mshtml/mshtml_private_iface.idl:
HRESULT checkValidity([retval, out] VARIANT_BOOL *ret);}
+[
- odl,
- oleautomation,
- dual,
- hidden,
- uuid(653c4bd0-1c68-5263-f82d-c2343ae7cd44)
+] +interface IWineHTMLParentFormPrivate : IDispatch
What's the point of it? We're not going to share its implementations, so we could as well just have those properties in element-specific interfaces (like Gecko does).