It appeared to be a common issue regarding ActiveX + IE.
We need to call TranslateAccelerator() so the IE will be able to process the tab key.
I’m new to Windows/ActiveX programming so I don’t really know where is the place in the code to do it.
I saw some snippets of code that do it in a CALLBACK functions like the CALLBACK activeXHookWndProc() in juce_win32_ActiveXComponents,
others do it in a HHOOK objects.
I tried but failed to add it to Juce.