System Variables

CTL

Control Code: Key to End Input

Numeric System Variable

Contents

Integer, end input code

Description

The CTL variable contains a numeric code (integer) that represents a signal of user input from the keyboard or mouse. From the keyboard, this code represents how the user ended the last INPUT statement.

Value

Represents

0

Enter key (normal)

1 - 4

F1 to F4 keys

5

Input terminated due to SIZ= option

6 - 12

F6 to F12 keys

> 12

Positive CTL codes (in the range 0 to 32767) represent function keys, as well as user-defined control signals that are to be returned to the application

< 0

Negative CTL codes are handled internally by PxPlus (see Negative CTL Definitions)