Update from a user using Chrome 62.0.3202.94 (64 bit) on Windows 10 (64 bit v-1703.15063.674)

I don’t see a caret object created event (but no matter if a move event comes in, we will treat that as created as well)

I don’t see a caret object destroyed event (but generally, a focus event occurs which causes ZoomText to declare the caret destroyed until another move)

I get 2 caret move events which provide different information in different cases
Using www.freedomscientific.com as the reference webpage, this is what I saw happen:

When the caret is positioned in the URL edit field
IA2_EVENT_TEXT_CARET_MOVED is fired regardless of whether the field contains any text (THIS IS GOOD)
Asking for the location of the event’s IAccessible returns the location of the entire edit field which is of no use since we want the caret’s location
Calls to IAccessibleText get_characterextents specifying IA2_TEXT_OFFSET_CARET & IA2CoordinateType::IA2_COORDTYPE_SCREEN_RELATIVE returned 0x80004001L: // E_NOTIMPL
Calls to IAccessibleText get_textAtOffset specifying IA2_TEXT_OFFSET_CARET, IA2TextBoundaryType::IA2_TEXT_BOUNDARY_CHAR, were successful and returned the character to the right of the caret location

EVENT_OBJECT_LOCATIONCHANGE event with OBJID_CARET is  fired regardless of whether the field contains any text (THIS IS GOOD)
Calls to GetAccessibleObjectFromWindow with OBJID_CARET returned an IAccessible whose
location was the caret
name was “edit”
value was “”
Calls to IAccessibleText get_textAtOffset specifying IA2_TEXT_OFFSET_CARET, IA2TextBoundaryType::IA2_TEXT_BOUNDARY_CHAR, always returns ‘E’ as in “Edit” the name of the control

When the caret is positioned in the Search edit field in the upper right side on that webpage
IA2_EVENT_TEXT_CARET_MOVED is  fired regardless of whether the field contains any text (THIS IS GOOD)
Asking for the location of the event’s IAccessible returns the location of the entire edit field which is of no use since we want the caret’s location
If there is no text in the edit control, calls to IAccessibleText get_characterextents specifying IA2_TEXT_OFFSET_CARET & IA2CoordinateType::IA2_COORDTYPE_SCREEN_RELATIVE returned an empty rect (THIS IS BAD – there is a blinking caret there)
If there is text in the edit control, calls to IAccessibleText get_characterextents specifying IA2_TEXT_OFFSET_CARET & IA2CoordinateType::IA2_COORDTYPE_SCREEN_RELATIVE returned the location of the caret
Calls to IAccessibleText get_textAtOffset specifying IA2_TEXT_OFFSET_CARET, IA2TextBoundaryType::IA2_TEXT_BOUNDARY_CHAR, were successful and returned the character to the right of the caret location (if there was one)
EVENT_OBJECT_LOCATIONCHANGE event with OBJID_CARET is  fired only if  the field contains text (THIS IS BAD)
If the field has text, actually got two EVENT_OBJECT_LOCATIONCHANGE events from different windows and Calls to GetAccessibleObjectFromWindow with OBJID_CARET returned an IAccessible with a location as follows:
Chrome_RenderWidgetHostHWND first with previous caret location
Chrome_WidgetWin_1 second with correct caret location
Calls to GetAccessibleObjectFromWindow with OBJID_CARET returned an IAccessible whose
location was the caret
name was “edit”
value was “”
Calls to IAccessibleText get_textAtOffset specifying IA2_TEXT_OFFSET_CARET, IA2TextBoundaryType::IA2_TEXT_BOUNDARY_CHAR, always returns ‘E’ as in “Edit” the name of the control

A quick check in a reply to an email in gmail yielded:
IA2_EVENT_TEXT_CARET_MOVED not fired at all
EVENT_OBJECT_LOCATIONCHANGE event with OBJID_CARET is  fired twice (same window classes as above) only if  the field (or line)  contains text (THIS IS BAD)
If the field has text, actually got two EVENT_OBJECT_LOCATIONCHANGE events from different windows and Calls to GetAccessibleObjectFromWindow with OBJID_CARET returned an IAccessible with a location as follows:
Chrome_RenderWidgetHostHWND first with last caret location
Chrome_WidgetWin_1 second with correct caret location
Calls to GetAccessibleObjectFromWindow with OBJID_CARET returned an IAccessible whose
location was the caret
name was “edit”
value was “”

Caret tracking.