Initializes a new read-only memory stream which will use the specified buffer data of length len. The stream does not take ownership of the buffer, i.e. that it will not delete in its destructor.
Creates a new read-only memory stream, initilalizing it with the data from the given output stream stream.
wxStreamBuffer * GetInputStreamBuffer(void) const
Returns the pointer to the stream object used as an internal buffer for that stream.