急问

if (pThisFrame->GetMediaType(&NewMT) == S_OK)

{

ValidFrames = 0;

hr = SetMediaType(NewMT);

DeleteMediaType(NewMT);

if (FAILED(hr))

return hr;

}

怎么理解了?这段程序在做什么了?

[190 byte] By [弱弱] at [2007-8-15 11:16:40]