var instance = new Vintasoft.Twain.WebTwainDeviceJS(deviceName, productFamily, manufacturer, driverVersion, twainVersion, deviceManager, is64Bit);

var value; // Type: any

// Parameters
var twainCapabilityIds; // Type: WebDeviceCapabilityIdEnumJS[]
var usageMode; // Type: number
var successFunc; // Type: function
var errorFunc; // Type: function

value = instance.getCapabilitiesAsync(twainCapabilityIds, usageMode, successFunc, errorFunc);

function getCapabilitiesAsync(
   twainCapabilityIds
An array of instances of WebDeviceCapabilityIdEnumJS class, which define identifiers of TWAIN device capabilities.
 : WebDeviceCapabilityIdEnumJS[], 
   usageMode
An integer value, which defines usage mode of TWAIN device capability.
 : number, 
   successFunc
A function that will be executed if request is executed successfully. Function prototype: "successFunc(twainDevice, capInfos)", where 'twainDevice' parameter is an instance of WebTwainDeviceJS class, 'capInfos' parameter is an array that contains information about TWAIN device capabilities.
 : Function, 
   errorFunc
A function that will be executed if request is failed. Function prototype: "errorFunc(twainDevice, errorMessage)", where 'twainDevice' parameter is an instance of WebTwainDeviceJS class, 'errorMessage' parameter is string that describes error.
 : Function
) : any;

Parameters

twainCapabilityIds

An array of instances of WebDeviceCapabilityIdEnumJS class, which define identifiers of TWAIN device capabilities.

usageMode

An integer value, which defines usage mode of TWAIN device capability.

successFunc

A function that will be executed if request is executed successfully. Function prototype: "successFunc(twainDevice, capInfos)", where 'twainDevice' parameter is an instance of WebTwainDeviceJS class, 'capInfos' parameter is an array that contains information about TWAIN device capabilities.

errorFunc

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

This function sends an asynchronous request to get information about TWAIN device capabilities. If you want to use synchronous request instead of asynchronous request, please use WebTwainDeviceJS.getCapabilities function.

Reference

WebTwainDeviceJS Class
WebTwainDeviceJS Members