Language Reference

Appendix

This Appendix contains information about the additional aspects of the PxPlus language, such as file options, labels, launch command syntax, operators, and control codes. It also includes supplementary information regarding pre-set system limits, error messages and reserved words.

The following links provide additional information:

Help Topic	Description
COM Ports and Serial Devices	Methods for opening a COM port for direct serial communication and access to serial devices.
Input/Output and Control Options	Various options that can be included in a directive or system function to fine tune code and redirect processing.
Data Format Masks	Character string masks used to define data (input/output) in PxPlus.
Displaying Bitmaps/Icons	Associating images (bitmaps or icons) for use within a PxPlus program.
Negative CTL Definitions	Actions that are assigned to negative CTL values, and have special significance to PxPlus.
Operators	All operators that can be used in PxPlus, including: property, assignment, auto-increment/decrement, LIKE, and the Apostrophe Operator.
Apostrophe Operator	Information on the use of the Apostrophe Operator.
Labels/Logical Statement References	Built-in statement labels that can be used instead of line number references in applications.
Reserved Words	Words that are reserved for internal use by PxPlus.
Setting Up Web Server as a Windows Service	Methods for installing PxPlus Web Server as a Windows Service.
System Limits	Preset system limits of PxPlus.
Error Codes and Messages	The numeric system variable ERR, error codes, and the messages associated with errors detected by PxPlus.
Customizing Radio Buttons and Check Boxes	Information on customizing the *default* Radio Button and Check Box display.
NOMADS Library Variables	Lists the NOMADS library variables.