var instance = new Vintasoft.Twain.WebTwainDeviceManagerJS(service);

var value; // Type: any

// Parameters
var successFunc; // Type: function
var errorFunc; // Type: function

value = instance.getDevicesAsync(successFunc, errorFunc);

function getDevicesAsync(
   successFunc
A function that will be executed if request is executed successfully.
 Function prototype: "successFunc(twainDeviceManager, twainDevices, defaultTwainDevice)", where 'twainDeviceManager' parameter is an instance of WebTwainDeviceManagerJS class, 'twainDevices' parameter is an array of instances of WebTwainDeviceJS class, 'defaultTwainDevice' parameter is an instance of WebTwainDeviceJS class.
 : Function, 
   errorFunc
A function that will be executed if request is failed.
 Function prototype: "errorFunc(twainDeviceManager, errorMessage)", where 'twainDeviceManager' parameter is an instance of WebTwainDeviceManagerJS class, 'errorMessage' parameter is string that describes error.
 : Function
) : any;

Parameters

successFunc

A function that will be executed if request is executed successfully.
Function prototype: "successFunc(twainDeviceManager, twainDevices, defaultTwainDevice)", where 'twainDeviceManager' parameter is an instance of WebTwainDeviceManagerJS class, 'twainDevices' parameter is an array of instances of WebTwainDeviceJS class, 'defaultTwainDevice' parameter is an instance of WebTwainDeviceJS class.

errorFunc

A function that will be executed if request is failed.
Function prototype: "errorFunc(twainDeviceManager, errorMessage)", where 'twainDeviceManager' parameter is an instance of WebTwainDeviceManagerJS class, 'errorMessage' parameter is string that describes error.

This function sends an asynchronous request to get a list of TWAIN devices installed in the system. If you want to use synchronous request instead of asynchronous request, please use WebTwainDeviceManagerJS.get_Devices and WebTwainDeviceManagerJS.get_DefaultDevice functions.

Reference

WebTwainDeviceManagerJS Class
WebTwainDeviceManagerJS Members