Rockwell-automation 1747-PCIS API Software - Open Controller Manual do Utilizador descarregar pdf (Página 63)

Publication 1747-UM002A-US-P - June 2000

Library of Routines 6-3

OC_CloseScanner

This function must always be called before exiting the application.

Syntax:

int OC_CloseScanner(HANDLE handle);

Parameters:

Description:

This function releases control of the scanner device, releases the

interrupt assigned by OC_OpenScanner, and disables the segment

address assignment.

Return Value:

Considerations:

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

Example:

HANDLE Handle;

int retcode;

retcode = OC_CloseScanner( Handle );

Parameter: Description:

handle Must be a valid handle returned from OC_OpenScanner

ATTENTION

The system might become unstable if you don’t call

OC_CloseScanner before exiting the application.

Name: Value: Description:

SUCCESS 0 scanner was closed successfully

ERR_OCACCESS 2

handle does not have access to the scanner

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Rockwell-automation 1747-PCIS API Software - Open Controller Manual do Utilizador Página 63