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CompositionTarget Class

Represents the display surface of your application.

Namespace:  System.Windows.Media
Assembly:  PresentationCore (in PresentationCore.dll)

[UIPermissionAttribute(SecurityAction::InheritanceDemand, Window = UIPermissionWindow::AllWindows)]
public ref class CompositionTarget abstract : public DispatcherObject, 

The CompositionTarget type exposes the following members.

Public propertyDispatcherGets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject.)
Public propertyRootVisualGets or sets the root visual of the CompositionTarget.
Public propertyTransformFromDeviceGets a matrix that can be used to transform coordinates from the rendering destination device to this target.
Public propertyTransformToDeviceGets a matrix that can be used to transform coordinates from this target to the rendering destination device.

Public methodCheckAccessDetermines whether the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject.)
Public methodDisposeDisposes CompositionTarget.
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Public methodVerifyAccessEnforces that the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject.)

Public eventStatic memberRenderingOccurs just before the objects in the composition tree are rendered.

CompositionTarget is a class that represents the display surface on which your application is being drawn. The WPF animation engine provides many features for creating frame-based animation. However, there are application scenarios in which you need control over rendering on a per frame basis. The CompositionTarget object provides the ability to create custom animations based on a per-frame callback.


For a complete code sample using CompositionTarget, see Using the CompositionTarget Sample.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.