DirectX files. How apply AnimationKey matrices ?

[Roman]

From frames matrices i got combine frames matrices.
I sort SkinWeights names and SkinBone matrices in the order.
Then multiply SkinBoneMatrices on combine frames matrices. I got correct Bind Pose and 3d model looks right.
But how apply AnimationKeys matrices (I am using only matrices, not quaternions) ?
I think:
1) SkinBoneMatrices multiply on AnimationKeys matrices = AnimMatrices
2) combine frames matrices multiply on AnimMatrices

or

1) combine frames matrices multiply on AnimationKeys matrices = AnimMatrices
2) SkinBoneMatrices multiply on AnimMatrices

[Roman]

Or Combine AnimationKeysMatrices and multiply SkinBoneMatrices on Combine AnimationKeysMatrices
And not using combine frame matrices.