ProvideX V8.20 > Language Reference > A. Appendix
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A
   Appendix
Overview
This appendix discusses additional features of the ProvideX language, such as file
options, labels, launch command syntax, operators, and control codes. It also includes
supplementary information regarding preset system limits, error messages, and reserved
words. Section headings, page numbers, and outlines are listed below:
COM Ports and Serial Devices, p.806
Methods for opening a COM port for direct serial communication and access to
serial devices.
Input/Output and Control Options, p.808
Various options that can be included in a directive or system function to fine tune
code and redirect processing.
Data Format Masks, p.811
Character string masks used to define data (input/output) in ProvideX.
Labels/Logical Statement References, p.814
Built-in line labels that can be used instead of line number references in
applications.
Displaying Controls/Images, p.815
Associating images (bitmaps or icons) for use within a ProvideX program.
Negative CTL Definitions, p.822
Actions that are assigned to negative CTL values, and have special significance to
ProvideX.
Operators, p.826
All operators that can be used in ProvideX, including: property, assignment,
auto-increment/decrement, LIKE, and the Apostrophe Operator, p.828.
System Limits, p.830
Preset system limits of ProvideX.
Reserved Words, p.832
Words that are reserved for internal use by ProvideX.
Error Codes and Messages, p.833
The numeric system variable ERR, error codes, and the messages associated with
errors detected by ProvideX.