/// <summary>
/// Changes the playback position of the playing media in any direction by the given amount of video frames. The result can differ from the specified value.
/// </summary>
/// <param name="frames">The amount of frames to step (use a negative value to step backwards).</param>
public int Step(int frames)
{
if (!_base._fileMode || !_base._playing)
{
_base._lastError = HResult.MF_E_NOT_AVAILABLE;
return((int)_base._lastError);
}
else
{
return(_base.Step(frames));
}
}