Attempts to set focus to this element.
Assembly: PresentationCore (in PresentationCore.dll)
Even if an element is focusable and enabled, event handling within a specific tree, (such as for a composite control) might respond to the preview focus events by not allowing focus there, thus this method would return false.
Focus in general is governed by two separate concepts: keyboard focus and logical focus, which are not always identical. This method sets the logical focus. There is no programmatic means to set keyboard focus specifically; keyboard focus is determined by user input. For more information, see Focus Overview and Input Overview.
If the related properties are not already true, when you call , one or more of the following events are raised in the following order: PreviewLostKeyboardFocus, PreviewGotKeyboardFocus (source is the new focus target), IsKeyboardFocusedChanged, IsKeyboardFocusWithinChanged, LostKeyboardFocus, GotKeyboardFocus (source is the new focus target).
The following example is a page-loaded event handler that finds a specified named paragraph in the document and sets focus to it. Paragraphs are not focusable by default; this particular paragraph had a style applied (not shown) that used a style Setter to make it focusable.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2