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

var value; // Type: Vintasoft.Twain.WebPageSizeEnumJS
value = instance.get_PageSize();

function get_PageSize() : WebPageSizeEnumJS;

Return Value

This property sends a synchronous request to get value of WebDeviceCapabilityIdEnumJS.ISupportedSizes capability. If you want to use asynchronous request instead of synchronous request, please get information about WebDeviceCapabilityIdEnumJS.ISupportedSizes capability using WebTwainDeviceJS.getCapabilityAsync or WebTwainDeviceJS.getCapabilitiesAsync function.

Reference

WebTwainDeviceJS Class
WebTwainDeviceJS Members