IAsyncReader::Length method (strmif.h)
Length method retrieves the total length of the stream.
HRESULT Length( LONGLONG *pTotal, LONGLONG *pAvailable );
Pointer to a variable that receives the length of the stream, in bytes.
Pointer to a variable that receives the portion of the stream that is currently available, in bytes.
Returns an HRESULT value. Possible values include the following.
||The returned values are estimates; for example, if the file is being read over a network.|
||The file is not open or no longer exists.|
For streams retrieved over a network, the entire stream may not be available at first. Read operations beyond the available length might block for a long period of time, until that portion of the stream becomes available.
|Minimum supported client||Windows 2000 Professional [desktop apps only]|
|Minimum supported server||Windows 2000 Server [desktop apps only]|
|Header||strmif.h (include Dshow.h)|