Constructs a CXlIStrStream object
                CXlIStrStream( void* p, size_t cb );  | 
            
A pointer to a byte array (of size cb) which contains serialized data.
The size of a byte array which contains serialized data.
This method constructs a CXlIStrStream object, which will read serialized data from its inner istrstream.
Header: xlserialize.h