The AVIStreamStart function returns the starting sample number for the stream.
STDAPI_(LONG) AVIStreamStart(
PAVISTREAM pavi
);
Returns the number if successful or – 1 otherwise.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in vfw.h.
Import Library: Use vfw32.lib.
AVIFile Functions and Macros Overview, AVIFile Functions