IDCompositionMatrixTransform::SetMatrixElement(int,int,IDCompositionAnimation*) method (dcomp.h)

Animates the value of one element of the matrix of this 2D transform.


HRESULT SetMatrixElement(
  [in] int                    row,
  [in] int                    column,
  [in] IDCompositionAnimation *animation


[in] row

The row index of the element to change. This value must be between 0 and 2, inclusive.

[in] column

The column index of the element to change. This value must be between 0 and 1, inclusive.

[in] animation

An animation that represents how the value of the specified element changes over time. This parameter must not be NULL.

Return value

If the function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code. See DirectComposition Error Codes for a list of error codes.


This method makes a copy of the specified animation. If the object referenced by the animation parameter is changed after calling this method, the change does not affect the element unless this method is called again. If the element was previously animated, calling this method replaces the previous animation with the new animation.

This method fails if animation is an invalid pointer or if it was not created by the same IDCompositionDevice interface as the affected transform. The interface cannot be a custom implementation; only interfaces created by Microsoft DirectComposition can be used with this method.


Minimum supported client Windows 8 [desktop apps only]
Minimum supported server Windows Server 2012 [desktop apps only]
Target Platform Windows
Header dcomp.h
Library Dcomp.lib
DLL Dcomp.dll

See also