Using scripts in Tasks

const cMsg_001 = 'Scan barcode or enter manually and press [Enter]. Click Cancel to exit.';
const cMsg_002 = 'No item found with barcode "%s".';


function processInput() {

    // Show a dialog box for entering/scanning a barcode
    let bc = azureLabel.showInput('', '', cMsg_001, false, false, false);
	if (bc === operationCanceledByUser) {
		return false;
	}
	azureLabel.log(bc);

    recordsToPrint.clear();
    // Looking for an entry with this barcode
    let finded = false;
	const loadedDataCount = loadedData.count();
    for (let i = 0; i < loadedDataCount; i++) {

        if (loadedData.getFieldValue(i, barcodeFieldName) === bc){
	        azureLabel.copyRowFromOneListToAnother(loadedData,
	                                    i,
	                                    recordsToPrint,
	                                    -1)
	        finded = true;
	        break;
        }
    }

    // No entry with this barcode found
    if (!finded) {
        azureLabel.showMessage('', azureLabel.format(cMsg_002, bc), 0, 0, 0, 2);
        return true;
    }

    // Print labels
    try {
        azureLabel.printLabels( recordsToPrint, -1, '', '', true, showPreview);
	}
	catch (error) {
        azureLabel.showMessage('', error.toString(), 0, 0, 0, 2);
	}
    return true;
}

// Show label preview
const showPreview = false;

// The AzureLabel library is required to use the special ListOfRecords class
const ext = require('azurelabel_ext');
// Create a list of records to be passed to the label printing function
const recordsToPrint = new ext.ListOfRecords;
// Create a list of records to store data from Label Printing Data
const loadedData = new ext.ListOfRecords;
// Loading data from Label Printing Data into the list
azureLabel.getLoadedData(loadedData);

// Name of the field with barcodes for program versions <= 12.27
let barcodeFieldName = 'Barcode';
let operationCanceledByUser = '';
try {
	// If the program version is > 12.27
	// Find the name of the field with the attribute 'This is a barcode field'
	barcodeFieldName = loadedData.getBarcodeFieldName(0);
	operationCanceledByUser = 'OperationCanceledByUser';
}
catch (error) {
}

// Cycle of receiving barcode and printing labels
while (processInput());