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

var value; // Type: any

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

value = instance.getImageLayoutAsync(successFunc, errorFunc);

function getImageLayoutAsync(
   successFunc
A function that will be executed if request is executed successfully. Function prototype: "successFunc(twainDevice, imageLayout)", where 'twainDevice' parameter is an instance of WebTwainDeviceJS class, 'imageLayout' parameter is an object that contains information about current image layout rectangle, in units of measure specified by get_UnitOfMeasure() function, of TWAIN device.
 : 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

successFunc

A function that will be executed if request is executed successfully. Function prototype: "successFunc(twainDevice, imageLayout)", where 'twainDevice' parameter is an instance of WebTwainDeviceJS class, 'imageLayout' parameter is an object that contains information about current image layout rectangle, in units of measure specified by get_UnitOfMeasure() function, of TWAIN device.

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 the current image layout rectangle of TWAIN device. If you want to use synchronous request instead of asynchronous request, please use WebTwainDeviceJS.getImageLayout function.

Reference

WebTwainDeviceJS Class
WebTwainDeviceJS Members