Rockwell Automation 1747-PCINT API Software for 1746 I/O - Manual (Page 58)

6–4 Library of Routines OC_CloseScanner
Publication 1747-6.5.3 June 1998
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