ACM_PLAY


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ACM_PLAY
ACM_PLAY 
    wParam = (WPARAM) (UINT) cRepeat; 
    lParam = (LPARAM) MAKELONG(wFrom, wTo); 
Plays an AVI clip in an animation control. The control plays the clip in the background while the thread continues executing. You can send this message explicitly or by using the Animate_Play macro.
Returns nonzero if successful, or zero otherwise.

cRepeat
Number of times to replay the AVI clip. A value of -1 means replay the clip indefinitely.
wFrom
Zero-based index of the frame where playing begins. The value must be less than 65,536. A value of zero means begin with the first frame in the AVI clip.
wTo
Zero-based index of the frame where playing ends. The value must be less than 65,536. A value of -1 means end with the last frame in the AVI clip.

You can use Animate_Seek to direct the animation control to display a particular frame of the AVI clip.
The Animate_Play and Animate_Seek macros are defined in Commctrl.h.

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