The AddHostObject demo has an access violation in CallCallbackAsynchronously

[salvadordf]

TSampleHostObjectClass.CallCallbackAsynchronously has an access violation when it calls Param1.Invoke with an empty GUID

[the-Arioch]

A.S. it should be GUID_NULL var not TGUID.Empty function for the same of earlier Delphi versions. XE 2 does have itm buyt D2007 does not.

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i did not observe AVs running demoes, and i think i saw your comments in the demo source that suggest you already fixed it

maybe i would give it a thorough look, if to know where to look at

ATM i do not see i would need this method at all in the limited functionality i would need (replace old DCEF), OTOH we mostly use WSH/JScript now, shich is single-thread and synchronous. Maybe i actually would need it, just do not know yet :-)

I would need to call methods and read/write properties of Delphi 1-thread core. This seems more naturaly done in synchronous way, that WebView2 provides already, i guess.

DCEF code used fake domain and custom URL scheme for it, which i hope to repeat for easier migration, but Host Objects feel more natural approach, so would implement them too.

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that said, D2007 is notoriously bad with debugging on Win10, so if i did not see AVs it is not a proof there were none :-)