OPEN

OPEN is used to open a file, COM(serial) or LPT(parallel) port.

Syntax 1: OPEN FileName$ FOR Mode AS #FileNumber [LEN = Bytes]

FileName$: as a string file name using the DOS 8.3 naming convention limits.

Modes: Open can use 5 different access modes:

 OUTPUT: Creates a new file or erases an existing file for program output
 APPEND: Creates a new file or appends data output to existing file
 BINARY: Creates a new file or uses input and/or output from existing file
 RANDOM: Creates a new file or uses input and/or output from existing file
 INPUT : Only reads input from an existing file

FileNumber: as a low Integer number or a value from the FREEFILE function.

Bytes: number of bytes used in a RANDOM record as defined by FIELD or TYPE definitions.