using DirectShowLib; namespace DualScreenDemo { public class SampleGrabberCallback : ISampleGrabberCB { private VideoPlayerForm form; public SampleGrabberCallback(VideoPlayerForm form) { this.form = form; } public int BufferCB(double SampleTime, IntPtr pBuffer, int BufferLen) { return 0; } public int SampleCB(double SampleTime, IMediaSample pSample) { return 0; } } }