ns-uiautomationcore-uiachangeinfo.md

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NS:uiautomationcore.UiaChangeInfo	UiaChangeInfo (uiautomationcore.h)	Contains data about a UI Automation change that occurred.	PUiaChangeInfo PUiaChangeInfo structure pointer [Windows Accessibility] UiaChangeInfo UiaChangeInfo structure [Windows Accessibility] uiautomationcore/PUiaChangeInfo uiautomationcore/UiaChangeInfo winauto.uiachangeinfo	winauto\uiachangeinfo.htm	WinAuto	28C0C0DE-7ED2-4D01-B532-E56AD81AE8D0	12/05/2018	PUiaChangeInfo, PUiaChangeInfo structure pointer [Windows Accessibility], UiaChangeInfo, UiaChangeInfo structure [Windows Accessibility], uiautomationcore/PUiaChangeInfo, uiautomationcore/UiaChangeInfo, winauto.uiachangeinfo	uiautomationcore.h		Windows															Windows			19H1	UiaChangeInfo uiautomationcore/UiaChangeInfo	c++	APIRef kbSyntax	HeaderDef	UIAutomationCore.h	UiaChangeInfo

UiaChangeInfo structure

-description

Contains data about a UI Automation change that occurred.

-struct-fields

-field uiaId

Identifies the type of change info. Possible values are all the values of Change Identifiers, Property Identifiers, Text Attribute Identifiers, Annotation Type Identifiers and Style Identifiers.

-field payload

Information about the type of change that occurred.

-field extraInfo

Detailed information about the change that occurred.

-remarks

The provider can call UiaRaiseChangesEvent and pass in an array of UiaChangeInfo structs to notify clients of a related group of changes. The payload and extraInfo will vary depending on the uiaId populated in the UiaChangeInfo struct.

If there are multiple of any of these event types multiple UiaChangeInfo structs would be created. Below is a description of what these are for each pair of values.

UiaId	payload	extraInfo
UIA_SummaryChangeId	VT_BSTR A string describing the meaning of the change from an application point of view.	A constant ID value from the provider indicating the meaning of this event.
For UIA property changes, identified in the Property Identifiers section.	Type is the type of the property and the value is the new value of the property.
For text attributes changes, identified in the Text Attribute Identifiers section, extraInfo is not used.	Type is the type of the attribute and the value is the new value of the attribute.
For annotation changes, identified in the Annotation Type Identifiers section, extraInfo is not used.	VT_BSTR For text, the characters from the range to which the annotation applies.
For style changes, identified in the Style Identifiers section, extraInfo is not used.	VT_BSTR For text, the characters from the range to which the style applies.