Rockwell-automation 1747-PCIS API Software - Open Controller Uživatelský manuál stáhnout pdf (Strana 75)

Publication 1747-UM002A-US-P - June 2000

Library of Routines 6-15

Return Value:

Considerations:

Supported in the DOS API library and the Windows NT API library.

Example:

HANDLE Handle;

char *msg;

int rc;

if (SUCCESS != (rc = OC_OpenScanner(&Handle)))

{

/* Open failed - display error message */

OCErrorMsg(rc, &msg);

printf(“Error: %s\n”, msg);

}

OC_ExtendedErrorMsg

OC_ExtendedErrorMsg returns a descriptive text message associated

with an extended error.

Syntax:

int OC_ExtendedErrorMsg(HANDLE handle, OCEXTERR

*exterr, char **msg);

Parameters:

Name: Description:

SUCCESS errcode

was valid. msg points to corresponding error description.

ERR_OCPARAM errcode was invalid. msg points to unknown error code string.

Parameter: Description:

handle Must be a valid handle returned from OC_OpenScanner

exterr Points to an extended error

msg Points to a static buffer that contains a null-terminated message

string for the associated extended error

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Rockwell-automation 1747-PCIS API Software - Open Controller Uživatelský manuál Strana 75