TreeWalker.GetFirstChild Method (AutomationElement, CacheRequest)
Retrieves the first child element of the specified AutomationElement and caches properties and patterns.
Assembly: UIAutomationClient (in UIAutomationClient.dll)
public AutomationElement GetFirstChild( AutomationElement element, CacheRequest request )
- Type: System.Windows.Automation.AutomationElement
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.
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.