AVI File Read Data function (AVIFileReadData)

'AVIFileReadData function reads optional header data that applies to the entire file, such as author or copyright information
Private Declare Function AVIFileReadData Lib "avifil32.dll" Alias "AVIFileReadData" (ByVal pfile As Long, ByVal ckid As Integer, ByVal lpData As Long, ByRef lpcbData As Long) As Long
'Parameters
'   pfile Handle to an open AVI file.
'   ckid RIFF chunk identifier (four-character code) of the data.
'   lpData Pointer to the buffer used to return the data read.
'   lpcbData Pointer to a location indicating the size of the memory block referenced by lpData. If the data is read successfully, the value is changed to indicate the amount of data read.

Return Values

Returns zero if successful or an error otherwise. The return value AVIERR_NODATA indicates that data with the requested chunk identifier does not exist.


Remarks

The optional header information is custom and does not have a set format.
The argument pfile is a pointer to an IAVIFile interface.
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