COM error Class not registered

[Davider]

I tried to implement it using QM code, but still no luck.
The output result will not contain 'Caret'
However, success is very close

Function getISECaretPos
Trigger Ax     

Code:

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UIA.CUIAutomation u._create
UIA.IUIAutomationElement t=u.GetFocusedElement; out t.CurrentClassName
UIA.IUIAutomationElement e
UIA.IUIAutomationTreeWalker walker=u.RawViewWalker
e=walker.GetFirstChildElement(t)
e=walker.GetNextSiblingElement(e)

out e.CurrentControlType ;;Edit = 50004,Custom = 50025
out e.CurrentAutomationId ;;must Contains("Caret")

UIA.tagRECT r
r=e.CurrentBoundingRectangle
out r.left
out r.top
out r.right
out r.bottom