RichTextBox Class

Initializes a new, default instance of the RichTextBox class.

Initializes a new instance of the RichTextBox class, adding a specified FlowDocument as the initial content.

Identifies the IsDocumentEnabled dependency property.

Gets or sets a value that indicates how the text editing control responds when the user presses the ENTER key.

Gets or sets a value that indicates how the text editing control responds when the user presses the TAB key.

Gets the rendered height of this element.

Gets the rendered width of this element.

Gets or sets a value indicating whether this element can be used as the target of a drag-and-drop operation. This is a dependency property.

Gets a value that indicates whether at least one touch is captured to this element.

Gets a value that indicates whether at least one touch is captured to this element or to any child elements in its visual tree.

Gets a value that indicates whether at least one touch is pressed over this element.

Gets a value that indicates whether at least one touch is pressed over this element or any child elements in its visual tree.

Gets or sets a value that determines whether when a user selects part of a word by dragging across it with the mouse, the rest of the word is selected.

Gets or sets a brush that describes the background of a control.

Gets or sets the BindingGroup that is used for the element.

Gets or sets a bitmap effect that applies directly to the rendered content for this element. This is a dependency property.

Gets or sets an input source for the bitmap effect that applies directly to the rendered content for this element. This is a dependency property.

Gets or sets a brush that describes the border background of a control.

Gets or sets the border thickness of a control.

Gets or sets a cached representation of the UIElement.

Gets a value that indicates whether the most recent undo action can be redone.

Gets a value that indicates whether the most recent action can be undone.

Gets or sets the brush that is used to paint the caret of the text box.

Gets or sets the position of the input caret.

Gets or sets the geometry used to define the outline of the contents of an element. This is a dependency property.

Gets or sets a value indicating whether to clip the content of this element (or content coming from the child elements of this element) to fit into the size of the containing element. This is a dependency property.

Gets a collection of CommandBinding objects associated with this element. A CommandBinding enables command handling for this element, and declares the linkage between a command, its events, and the handlers attached by this element.

Gets or sets the context menu element that should appear whenever the context menu is requested through user interface (UI) from within this element.

Gets or sets the cursor that displays when the mouse pointer is over this element.

Gets or sets the data context for an element when it participates in data binding.

Gets or sets the key to use to reference the style for this control, when theme styles are used or defined.

Gets the DependencyObjectType that wraps the CLR type of this instance.

Gets the size that this element computed during the measure pass of the layout process.

Gets the Dispatcher this DispatcherObject is associated with.

Gets or sets the FlowDocument that represents the contents of the RichTextBox.

Gets or sets the bitmap effect to apply to the UIElement. This is a dependency property.

Gets the vertical size of the visible content area.

Gets the horizontal size of the visible content area.

Gets or sets the direction that text and other user interface (UI) elements flow within any parent element that controls their layout.

Gets or sets a value that indicates whether the element can receive focus. This is a dependency property.

Gets or sets a property that enables customization of appearance, effects, or other style characteristics that will apply to this element when it captures keyboard focus.

Gets or sets the font family of the control.

Gets or sets the font size.

Gets or sets the degree to which a font is condensed or expanded on the screen.

Gets or sets the font style.

Gets or sets the weight or thickness of the specified font.

Gets or sets a value that indicates whether this FrameworkElement should force the user interface (UI) to render the cursor as declared by the Cursor property.

Gets or sets a brush that describes the foreground color.

Gets a value that indicates whether a control supports scrolling.

Gets a value indicating whether this element has any animated properties.

Gets a value that indicates whether the UIElement has focus.

Gets or sets the suggested height of the element.

Gets or sets the horizontal alignment characteristics applied to this element when it is composed within a parent element, such as a panel or items control.

Gets or sets the horizontal alignment of the control's content.

Gets or sets the horizontal scroll position.

Gets or sets a value that indicates whether a horizontal scroll bar is shown.

Gets or sets the scope limits for property value inheritance, resource key lookup, and RelativeSource FindAncestor lookup.

Gets the collection of input bindings associated with this element.

Gets or sets the context for input used by this FrameworkElement.

Gets a value indicating whether the computed size and position of child elements in this element's layout are valid.

Gets or sets a value that indicates whether the user can interact with UIElement and ContentElement objects within the RichTextBox.

Gets or sets a value indicating whether this element is enabled in the user interface (UI). This is a dependency property.

Gets a value that becomes the return value of IsEnabled in derived classes.

Gets a value that determines whether this element has logical focus. This is a dependency property.

Gets or sets a value that declares whether this element can possibly be returned as a hit test result from some portion of its rendered content. This is a dependency property.

Gets or sets a value that indicates whether the text box displays selected text when the text box does not have focus.

Gets a value that indicates whether this element has been initialized, either during processing by a XAML processor, or by explicitly having its EndInit() method called.

Gets a value indicating whether an input method system, such as an Input Method Editor (IME), is enabled for processing the input to this element.

Gets a value indicating whether this element has keyboard focus. This is a dependency property.

Gets a value indicating whether keyboard focus is anywhere within the element or its visual tree child elements. This is a dependency property.

Gets a value that indicates whether this element has been loaded for presentation.

Gets or sets a value that indicates whether manipulation events are enabled on this UIElement.

Gets a value indicating whether the current size returned by layout measure is valid.

Gets a value indicating whether the mouse is captured to this element. This is a dependency property.

Gets a value that determines whether mouse capture is held by this element or by child elements in its visual tree. This is a dependency property.

Gets a value that indicates whether the position of the mouse pointer corresponds to hit test results, which take element compositing into account. This is a dependency property.

Gets a value indicating whether the mouse pointer is located over this element (including child elements in the visual tree). This is a dependency property.

Gets or sets a value that indicates whether the text editing control is read-only to a user interacting with the control.

Gets or sets a value that indicates whether a read-only text box displays a caret.

Gets a value that indicates whether this instance is currently sealed (read-only).

Gets a value that indicates whether the text box has focus and selected text.

Gets a value indicating whether the stylus is captured by this element. This is a dependency property.

Gets a value that determines whether stylus capture is held by this element, or an element within the element bounds and its visual tree. This is a dependency property.

Gets a value that indicates whether the stylus position corresponds to hit test results, which take element compositing into account. This is a dependency property.

Gets a value indicating whether the stylus cursor is located over this element (including visual child elements). This is a dependency property.

Gets or sets a value that indicates whether a control is included in tab navigation.

Gets or sets a value that indicates whether undo support is enabled for the text-editing control.

Gets a value indicating whether this element is visible in the user interface (UI). This is a dependency property.

Gets or sets localization/globalization language information that applies to an element.

Gets or sets a graphics transformation that should apply to this element when layout is performed.

Gets an enumerator that can iterate the logical children of the RichTextBox.

Gets or sets the outer margin of an element.

Gets or sets the maximum height constraint of the element.

Gets or sets the maximum width constraint of the element.

Gets or sets the minimum height constraint of the element.

Gets or sets the minimum width constraint of the element.

Gets or sets the identifying name of the element. The name provides a reference so that code-behind, such as event handler code, can refer to a markup element after it is constructed during processing by a XAML processor.

Gets or sets the opacity factor applied to the entire UIElement when it is rendered in the user interface (UI). This is a dependency property.

Gets or sets an opacity mask, as a Brush implementation that is applied to any alpha-channel masking for the rendered content of this element. This is a dependency property.

Gets or sets a value that indicates whether this element incorporates style properties from theme styles.

Gets or sets the padding inside a control.

Gets the logical parent element of this element.

Gets a value that uniquely identifies this element.

Gets (or sets) the final render size of this element.

Gets or sets transform information that affects the rendering position of this element. This is a dependency property.

Gets or sets the center point of any possible render transform declared by RenderTransform, relative to the bounds of the element. This is a dependency property.

Gets or sets the locally-defined resource dictionary.

Gets a TextSelection object containing the current selection in the RichTextBox.

Gets or sets the brush that highlights selected text.

Gets or sets the opacity of the SelectionBrush.

Gets or sets a value that defines the brush used for selected text.

Gets or sets a value that determines whether rendering for this element should use device-specific pixel settings during rendering. This is a dependency property.

Gets a SpellCheck object that provides access to spelling errors in the text contents of a TextBoxBase or RichTextBox.

Gets or sets the style used by this element when it is rendered.

Gets a collection of all stylus plug-in (customization) objects associated with this element.

Gets or sets a value that determines the order in which elements receive focus when the user navigates through controls by using the TAB key.

Gets or sets an arbitrary object value that can be used to store custom information about this element.

Gets or sets a control template.

Gets a reference to the template parent of this element. This property is not relevant if the element was not created through a template.

Gets or sets the tool-tip object that is displayed for this element in the user interface (UI).

Gets all touch devices that are captured to this element.

Gets all touch devices that are captured to this element or any child elements in its visual tree.

Gets all touch devices that are over this element.

Gets all touch devices that are over this element or any child elements in its visual tree.

Gets the collection of triggers established directly on this element, or in child elements.

Gets or sets the unique identifier (for localization) for this element. This is a dependency property.

Gets or sets the number of actions stored in the undo queue.

Gets or sets a value that indicates whether layout rounding should be applied to this element's size and position during layout.

Gets or sets the vertical alignment characteristics applied to this element when it is composed within a parent element such as a panel or items control.

Gets or sets the vertical alignment of the control's content.

Gets or sets the vertical scroll position.

Gets or sets a value that indicates whether a vertical scroll bar is shown.

Gets the vertical size of the scrollable content area.

Gets the horizontal size of the scrollable content area.

Gets or sets the user interface (UI) visibility of this element. This is a dependency property.

Gets or sets the BitmapEffect value for the Visual.

Gets or sets the BitmapEffectInput value for the Visual.

Gets or sets the BitmapScalingMode for the Visual.

Gets or sets a cached representation of the Visual.

Gets the number of visual child elements within this element.

Gets or sets the ClearTypeHint that determines how ClearType is rendered in the Visual.

Gets or sets the clip region of the Visual as a Geometry value.

Gets or sets the edge mode of the Visual as an EdgeMode value.

Gets or sets the bitmap effect to apply to the Visual.

Gets or sets the offset value of the visual object.

Gets or sets the opacity of the Visual.

Gets or sets the Brush value that represents the opacity mask of the Visual.

Gets the visual tree parent of the visual object.

Gets or sets a clipped scrollable area for the Visual.

Gets or sets the TextHintingMode of the Visual.

Gets or sets the TextRenderingMode of the Visual.

Gets or sets the Transform value for the Visual.

Gets or sets the x-coordinate (vertical) guideline collection.

Gets or sets the y-coordinate (horizontal) guideline collection.

Gets or sets the width of the element.

Adds a routed event handler for a specified routed event, adding the handler to the handler collection on the current element. Specify handledEventsToo as true to have the provided handler be invoked for routed event that had already been marked as handled by another element along the event route.

Adds a routed event handler for a specified routed event, adding the handler to the handler collection on the current element.

Adds the provided object to the logical tree of this element.

Adds handlers to the specified EventRoute for the current UIElement event handler collection.

Defines the parent-child relationship between two visuals.

Appends a string to the contents of a text control.

Applies an animation to a specified dependency property on this element, with the ability to specify what happens if the property already has a running animation.

Applies an animation to a specified dependency property on this element. Any existing animations are stopped and replaced with the new animation.

Builds the current template's visual tree if necessary, and returns a value that indicates whether the visual tree was rebuilt by this call.

Positions child elements and determines a size for a UIElement. Parent elements call this method from their ArrangeCore(Rect) implementation (or a WPF framework-level equivalent) to form a recursive layout update. This method constitutes the second pass of a layout update.

Implements ArrangeCore(Rect) (defined as virtual in UIElement) and seals the implementation.

Called to arrange and size the content of a Control object.

Starts a specific animation for a specified animated property on this element, with the option of specifying what happens if the property already has a running animation.

Starts an animation for a specified animated property on this element.

Begins a change block.

Starts the initialization process for this element.

Begins the sequence of actions contained in the provided storyboard, with specified state for control of the animation after it is started.

Begins the sequence of actions contained in the provided storyboard, with options specified for what should happen if the property is already animated.

Begins the sequence of actions that are contained in the provided storyboard.

Attempts to bring this element into view, within any scrollable regions it is contained within.

Attempts to bring the provided region size of this element into view, within any scrollable regions it is contained within.

Attempts to force capture of the mouse to this element.

Attempts to force capture of the stylus to this element.

Attempts to force capture of a touch to this element.

Determines whether the calling thread has access to this DispatcherObject.

Clears the local value of a property. The property to be cleared is specified by a DependencyProperty identifier.

Clears the local value of a read-only property. The property to be cleared is specified by a DependencyPropertyKey.

Coerces the value of the specified dependency property. This is accomplished by invoking any CoerceValueCallback function specified in property metadata for the dependency property as it exists on the calling DependencyObject.

Copies the current selection of the text editing control to the Clipboard.

Removes the current selection from the text editing control and copies it to the Clipboard.

Creates a change block.

Ends a change block.

Indicates that the initialization process for the element is complete.

Determines whether a provided DependencyObject is equivalent to the current DependencyObject.

Returns the common ancestor of two visual objects.

Finds an element that has the provided identifier name.

Searches for a resource with the specified key, and throws an exception if the requested resource is not found.

Attempts to set focus to this element.

Returns the base property value for the specified property on this element, disregarding any possible animated value from a running or stopped animation.

Returns the BindingExpression that represents the binding on the specified property.

Gets a hash code for this DependencyObject.

Returns a geometry for a clipping mask. The mask applies if the layout system attempts to arrange an element that is larger than the available display space.

Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject.

Returns a TextPointer that points to the next spelling error in the contents of the RichTextBox.

Returns a TextPointer that points to the insertion point closest to the specified position.

Returns a SpellingError object associated with any spelling error at a specified position in the contents of the RichTextBox.

Returns a TextRange object covering any misspelled word at a specified position in the contents of the RichTextBox.

Returns the named element in the visual tree of an instantiated ControlTemplate.

Gets the Type of the current instance.

Returns an alternative logical parent for this element if there is no visual parent.

Returns the current effective value of a dependency property on this instance of a DependencyObject.

Overrides GetVisualChild(Int32), and returns a child at the specified index from a collection of child elements.

Implements HitTestCore(GeometryHitTestParameters) to supply base element hit testing behavior (returning GeometryHitTestResult).

Implements HitTestCore(PointHitTestParameters) to supply base element hit testing behavior (returning HitTestResult).

Returns the input element within the current element that is at the specified coordinates, relative to the current element's origin.

Invalidates the arrange state (layout) for the element. After the invalidation, the element will have its layout updated, which will occur asynchronously unless subsequently forced by UpdateLayout().

Invalidates the measurement state (layout) for the element.

Re-evaluates the effective value for the specified dependency property.

Invalidates the rendering of the element, and forces a complete new layout pass. OnRender(DrawingContext) is called after the layout cycle is completed.

Determines whether the visual object is an ancestor of the descendant visual object.

Determines whether the visual object is a descendant of the ancestor visual object.

Scrolls the contents of the control down by one line.

Scrolls the contents of the control to the left by one line.

Scrolls the contents of the control to the right by one line.

Scrolls the contents of the control upward by one line.

Locks the most recent undo unit of the undo stack of the application. This prevents the locked unit from being merged with undo units that are added subsequently.

Updates the DesiredSize of a UIElement. Parent elements call this method from their own MeasureCore(Size) implementations to form a recursive layout update. Calling this method constitutes the first pass (the "Measure" pass) of a layout update.

Implements basic measure-pass layout system behavior for FrameworkElement.

Called to re-measure the RichTextBox.

Creates a shallow copy of the current Object.

Moves the keyboard focus away from this element and to another element in a provided traversal direction.

Provides class handling for when an access key that is meaningful for this element is invoked.

Is called when a control template is applied.

Supports layout behavior when a child element is resized.

Invoked whenever an unhandled ContextMenuClosing routed event reaches this class in its route. Implement this method to add class handling for this event.

Called whenever an unhandled ContextMenuOpening routed event reaches this class in its route. Implement this method to add class handling for this event.

Creates and returns an AutomationPeer object for this RichTextBox.

Called when the DPI at which this Rich Text Box is rendered changes.

Invoked whenever an unhandled DragEnter attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked whenever an unhandled DragLeave attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked whenever an unhandled DragOver attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked whenever an unhandled DragEnter attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked whenever an unhandled GiveFeedback attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked whenever an unhandled GotFocus event reaches this element in its route.

Invoked whenever an unhandled GotKeyboardFocus attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked when an unhandled GotMouseCapture attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled GotStylusCapture attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Provides class handling for the GotTouchCapture routed event that occurs when a touch is captured to this element.

Raises the Initialized event. This method is invoked whenever IsInitialized is set to true internally.

Invoked when an unhandled IsKeyboardFocusedChanged event is raised on this element. Implement this method to add class handling for this event.

Invoked just before the IsKeyboardFocusWithinChanged event is raised by this element. Implement this method to add class handling for this event.

Invoked when an unhandled IsMouseCapturedChanged event is raised on this element. Implement this method to add class handling for this event.

Invoked when an unhandled IsMouseCaptureWithinChanged event is raised on this element. Implement this method to add class handling for this event.

Invoked when an unhandled IsMouseDirectlyOverChanged event is raised on this element. Implement this method to add class handling for this event.

Invoked when an unhandled IsStylusCapturedChanged event is raised on this element. Implement this method to add class handling for this event.

Invoked when an unhandled IsStylusCaptureWithinChanged event is raised on this element. Implement this method to add class handling for this event.

Invoked when an unhandled IsStylusDirectlyOverChanged event is raised on this element. Implement this method to add class handling for this event.

Invoked whenever an unhandled KeyDown attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked whenever an unhandled KeyUp attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Raises the LostFocus event (using the provided arguments).

Invoked whenever an unhandled LostKeyboardFocus attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked when an unhandled LostMouseCapture attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled LostStylusCapture attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Provides class handling for the LostTouchCapture routed event that occurs when this element loses a touch capture.

Called when the ManipulationBoundaryFeedback event occurs.

Called when the ManipulationCompleted event occurs.

Called when the ManipulationDelta event occurs.

Called when the ManipulationInertiaStarting event occurs.

Called when the ManipulationStarted event occurs.

Provides class handling for the ManipulationStarting routed event that occurs when the manipulation processor is first created.

Raises the MouseDoubleClick routed event.

Invoked whenever an unhandled MouseDown attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked when an unhandled MouseEnter attached event is raised on this element. Implement this method to add class handling for this event.

Invoked when an unhandled MouseLeave attached event is raised on this element. Implement this method to add class handling for this event.

Invoked when an unhandled MouseLeftButtonDown routed event is raised on this element. Implement this method to add class handling for this event.

Invoked when an unhandled MouseLeftButtonUp routed event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked whenever an unhandled MouseMove attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked when an unhandled MouseRightButtonDown routed event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled MouseRightButtonUp routed event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked whenever an unhandled MouseUp event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Is called when a MouseWheel event is routed to this class (or to a class that inherits from this class).

Invoked when an unhandled PreviewDragEnter attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewDragLeave attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewDragOver attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewDrop attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewGiveFeedback attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewGotKeyboardFocus attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Called when the KeyDown occurs.

Invoked when an unhandled PreviewKeyUp attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewKeyDown attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Raises the PreviewMouseDoubleClick routed event.

Invoked when an unhandled PreviewMouseDown attached routed event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewMouseLeftButtonDown routed event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewMouseLeftButtonUp routed event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewMouseMove attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewMouseRightButtonDown routed event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewMouseRightButtonUp routed event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewMouseUp attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewMouseWheel attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewQueryContinueDrag attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewStylusButtonDown attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewStylusButtonUp attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewStylusDown attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewStylusInAirMove attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewStylusInRange attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewStylusMove attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewStylusOutOfRange attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewStylusSystemGesture attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewStylusUp attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Invoked when an unhandled PreviewTextInput attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

Provides class handling for the PreviewTouchDown routed event that occurs when a touch presses this element.

Provides class handling for the PreviewTouchMove routed event that occurs when a touch moves while inside this element.

Provides class handling for the PreviewTouchUp routed event that occurs when a touch is released inside this element.

Invoked whenever the effective value of any dependency property on this FrameworkElement has been updated. The specific dependency property that changed is reported in the arguments parameter. Overrides OnPropertyChanged(DependencyPropertyChangedEventArgs).

Invoked whenever an unhandled QueryContinueDrag attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

Invoked whenever an unhandled QueryCursor attached routed event reaches an element derived from this class in its route. Implement this method to add class handling for this event.

When overridden in a derived class, participates in rendering operations that are directed by the layout system. The rendering instructions for this element are not used directly when this method is invoked, and are instead preserved for later asynchronous use by layout and drawing.