Searching for a RIFF Chunk

The following example uses the mmioDescend function to search for a "RIFF" chunk with a form type of "WAVE" to verify that the file that has just been opened is a waveform-audio file.

HMMIO    hmmio; 
MMCKINFO mmckinfoParent; 
MMCKINFO mmckinfoSubchunk; 
// Locate a "RIFF" chunk with a "WAVE" form type to make 
// sure the file is a waveform-audio file. 
mmckinfoParent.fccType = mmioFOURCC('W', 'A', 'V', 'E'); 
if (mmioDescend(hmmio, (LPMMCKINFO) &mmckinfoParent, NULL, 
    // The file is not a waveform-audio file. 
    // The file is a waveform-audio file