ScanNoWait

Description

Starts a scan operation, but returns immediately, permitting continuous scans.

Applies to

BarcodeScanner objects

Syntax

Integer scanner.ScanNoWait ( )

Argument	Description
scanner	The scanner object for which you want to set up continuous scanning

Returns

Integer. Returns 1 for success or one of the following negative values if an error occurs:

-1 Unspecified error
-2 Supporting DLL not loaded error
-3 Initialization error other than DLL not loaded
-4 Error in the passed in arguments
-5 Something in the object instance is inconsistent
-6 Call to the driver failed
-7 Error opening the specific scan device
-8 Error in the internal buffer allocation
-9 Incorrect scan state for the requested action (typically benign)
-10 Low level device error
-11 Read is already pending (typically benign)
-12 Read is cancelled (typically benign)
-14 Error creating the asynchronous read from the message sink
-100 Feature not implemented

Usage

The ScanNoWait function is used to set an asynchronous scan operation. In a typical implementation, the ScanNoWait call is made in the ScanTriggered event, which leads to continuous (asynchronous) scan readings.

Examples

Example 1

The following example in the script for the ScanTriggered event sets the scanner for continuous operation:

li_rtn = l_scanner.ScanNoWait()