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High-Level Language Application Programming Interface

4-81

START KEYSTROKE INTERCEPT (50)

Purpose

Enables an HLLAPI application to filter any keystrokes sent to a session by a user.

Prerequisite Calls

This function requires no prerequisite calls to other functions.

Syntax

hllc (func, apistring, len, ret)

int *func;

char *apistring;

int *len;

int *ret;

Supplied Parameters

Supply the following parameters to invoke the START KEYSTROKE INTERCEPT function:

func Specifies the number of the function called; must be 50 for the START

KEYSTROKE INTERCEPT function.

len Does not apply for this function.

ret Does not apply for this function.

apistring Specifies the attributes of the data string; the calling 6 character data string

contains:

Byte Definition

Position 1 One of the following:

• The one-character letter short session ID of the PS

• A blank or null indicating a function call against the

currently connected host PS

Position 2 A code character:

• D for AID keystrokes only

• L for all keystrokes

Positions 3–6 The data in these positions is ignored by HLLAPI. However,

no error occurs if a migrating program has data in these

positions. This data is accepted by HLLAPI to provide

compatibility with migrating applications.

Returned Parmeters

ret The following codes are valid:

0 Specifies that the START KEYSTROKE INTERCEPT

function was successful.

1 Specifies that the PS was invalid.

1 2 ... 276 277 278 279 280 281 282 283 284 285 286 ... 333 334

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Bull DPX/20 Guía de instalación Pagina 281