function OpenFile(fileName$, mode)
sub CloseFile( stream )
function ReadByte(stream)
sub WriteByte(stream, byte)
function ReadLine$(stream)
sub Write(stream, txt$)
sub WriteLine(stream, txt$)
sub CopyFile(src$, dst$)
function RemoveFile(fileName$)
function FileExists(fileName$)
function MoveFile(src$, dst$)
function RenameFile(src$, dst$)
function FileLength(fileName$)
function Tell(stream)
function Seek(stream, pos)
function EOF(stream)
function WriteByteBuffer(stream, ByRef buf, buf_size)
function ReadByteBuffer(stream, ByRef buf, buf_size)