Windows Media Player 11 SDK IWMPEvents::Buffering
The Buffering event occurs when the Windows Media Player control begins or ends buffering.
void Buffering( VARIANT_BOOL Start );
[in] Specifies whether buffering has begun or ended. A value of true indicates that it has begun; a value of false indicates that it has ended.
This event does not return a value.
Use this event to determine when buffering or downloading starts or stops. You can use the same event block for both cases and test IWMPNetwork::get_bufferingProgress and IWMPNetwork::get_downloadProgress to determine whether Windows Media Player is currently buffering or downloading content.
Version: Windows Media Player 9 Series or later.
Header: Include wmp.h.
Library: Use wmp.dll.