DEC Text Processing Utility Data Types

3.4 Keyword Data Type

Table 3–1 (Cont.)

Keywords Used for Key Names

 

 

 

 

 

VT400, VT300, VT200

 

DECTPU Key Name

Series Key

VT100 Key

 

 

 

Ctrl_Z_KEY

Ctrl/Z

Ctrl/Z

 

 

 

The OpenVMS terminal driver handles the following keys as special cases. Compaq recommends that you avoid defining the following control characters and function key:

•Ctrl/C

•Ctrl/O

•Ctrl/Q

•Ctrl/S

•Ctrl/T

•Ctrl/X

•Ctrl/Y

•F6

3.5Learn Data Type

A learn sequence is a collection of DECTPU keystrokes for use later. The LEARN_BEGIN built-in procedure starts collecting keystrokes; the LEARN_END built-in procedure stops the collection of keystrokes and returns a value of the learn data type as a result. The following example assigns a learn data type to the variable x:

LEARN_BEGIN (EXACT);

.

.

.

x := LEARN_END;

All keystrokes that you enter between the LEARN_BEGIN and LEARN_END built-in procedures are stored in the variable x. The EXACT keyword specifies that, when the learn sequence is replayed, the input (if any) for the built-in procedures READ_CHAR, READ_KEY, and READ_LINE (if used in the learn sequence) will be the same as the input entered when the learn sequence was created. If you specify NO_EXACT, a replay of a learn sequence containing keys that invoke the built-in procedures READ_LINE, READ_KEY, or READ_CHAR looks for new input.

For more information on replaying a learn sequence, see LEARN_BEGIN and LEARN_END in the DEC Text Processing Utility Reference Manual.

You can use the LEARN_ABORT built-in procedure to interrupt the execution of a learn sequence. For information on using LEARN_ABORT, see LEARN_ABORT in the DEC Text Processing Utility Reference Manual.

DEC Text Processing Utility Data Types 3–7

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Compaq AA-PWCBD-TE manual Learn Data Type, Cont Keywords Used for Key Names
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