TreeWalker.GetFirstChild Method (AutomationElement)
Retrieves the first child element of the specified AutomationElement.
Assembly: UIAutomationClient (in UIAutomationClient.dll)
The element from which to retrieve the first child.
Return ValueType: System.Windows.Automation.AutomationElement
The first child element, or a null reference (Nothing in Microsoft Visual Basic .NET) if there is no such element.
An AutomationElement can have additional child elements that do not match the current view condition and thus are not returned when navigating the element tree.
The structure of the AutomationElement tree changes as the visible user interface (UI) elements on the desktop change. It is not guaranteed that an element returned as the first child element will be returned as the first child on subsequent passes.
Available since 3.0