freefile ( )
BASIC256 allows for multiple files to be opened at a single time. The freefile function returns a free open_file_number that you can use in your next Open or Openb. Once a file is closed, freefile will return that open_file_number to the list of available file numbers and may reissue that number.
# copy one binary file to another k = 0 source = freefile openb source,"file.pdf" dest = freefile openb dest,"file_copy.pdf" reset dest while not eof(source) writebyte dest, readbyte(source) k++ end while close dest close source print k + " bytes copied."
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