Use CAniButton as a normal CButton (Style must be Owner draw) On Init dialog simply use LoadAVI( AVI_ID ) where AVI_ID is ID of AVI file loaded in resources.
The button will resize to match the size of AVI animation. The first frame of animation will be used as a static look. Be careful when you create your own AVI file. Not everything could be played !
Here is what is written for Animated control in MSDN:
Animation controls can play only simple AVI clips. Specifically, the clips
to be played by an animation control must meet the following requirements:
-There must be exactly one video stream and it must have at least one frame.
-There can be at most two streams in the file (typically the other stream, if present, is an audio stream, although the animation control ignores audio information).
-The clip must either be uncompressed or compressed with RLE8 compression.
-No palette changes are allowed in the video stream.
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