ACN_START notification code
Notifies an animation control's parent window that the associated AVI clip has started playing. This notification code is sent in the form of a WM_COMMAND message.
ACN_START WPARAM wParam; LPARAM lParam;
An HWND that specifies the handle to the animation control.
|Minimum supported client
||Windows Vista [desktop apps only]
|Minimum supported server
||Windows Server 2003 [desktop apps only]