Returns the size in bytes of the stream needed to save the object.
| ULARGE_INTEGER *pcbSize
||//Pointer to size of stream needed to save object
[out]Points to a 64-bit unsigned integer value indicating the size in bytes of
the stream needed to save this object.
The size was successfully returned.
This method returns the size needed to save an object. You can call this
method to determine the size and set the necessary buffers before calling the IPersistStream::Save
Notes to Implementors
implementation should return a conservative estimate of the necessary size
because the caller might call the IPersistStream::Save
method with a non-growable stream.
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