SYSTEM - QB64Official/qb64 GitHub Wiki

The SYSTEM statement immediately closes a program and returns control to the operating system.

Syntax

SYSTEM [return_code%]

Parameter(s)

• QB64 allows a code number to be used after SYSTEM to be read in another program module by the SHELL or _SHELLHIDE functions.

Description

• This command should be used to close a program quickly instead of pausing with END or nothing at all.
• A code can be added after the statement to send a value to the SHELL (function) or _SHELLHIDE function in another module.
• SYSTEM ends the program and closes the window immediately. The last screen image may not be displayed.

QBasic

• QBasic BAS files can be run like compiled programs without returning to the IDE when SYSTEM is used to END them!
• If a program BAS module is run from the IDE, stopped by Ctrl-Break or an error occurs the QB program will exit to the IDE.
• To run a QuickBASIC program without the IDE use the following DOS command line: QB.EXE /L /RUN filename.BAS

See Also

• SHELL (function)
• _SHELLHIDE (function)
• _EXIT (function), END