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Retrieves the stream's total length, and the currently available length.
HRESULT Length( LONGLONG* pTotal , LONGLONG* pAvailable );
Parameters
- pTotal
- Total allocated length.
- pAvailable
- Available length.
Return Values
Returns S_OK if successful, E_UNEXPECTED if the file has not been opened.
Remarks
Read operations beyond the available length but within the total length will normally succeed, but they might block for a long period of time.