Support UIA LabeledBy property

source/NVDAObjects/UIA/__init__.py

@@ -2386,6 +2386,19 @@ def _get_controllerFor(self):
 				objList.append(obj)
 		return objList
 
+	def _get_labeledBy(self):
+		try:
+			val = self._getUIACacheablePropertyValue(UIAHandler.UIA_LabeledByPropertyId)
+			if not val or val == UIAHandler.handler.reservedNotSupportedValue:
+				return None
+			element = val.QueryInterface(UIAHandler.IUIAutomationElement).buildUpdatedCache(
+				UIAHandler.handler.baseCacheRequest,
+			)
+			return UIA(UIAElement=element)
+		except COMError:
+			pass
+		return super()._get_labeledBy()
+
 	def event_UIA_controllerFor(self) -> None:
 		return self.event_controllerForChange()
 

user_docs/en/changes.md

@@ -70,6 +70,7 @@ Specifically, MathML inside of span and other elements that have the attribute `
 * Opening the NVDA Python Console will no longer fail in case an error occurs while retrieving snapshot variables. (#17391, @CyrilleB79)
 * In Notepad and other UIA documents on Windows 11, if the last line is empty, the `braille next line command` will move the cursor to the last line.
 In any document, if the cursor is on the last line, it will be moved to the end when using this command. (#17251, @nvdaes)
+* In NVDA's Python console, retrieving the "labeledBy" property now works for UIA elements supporting the corresponding LabeledBy UIA property. (#17442, @michaelweghorn)
 
 ### Changes for Developers