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

var value; // Type: Vintasoft.Twain.WebPageOrientationEnumJS
value = instance.get_PageOrientation();

function get_PageOrientation() : WebPageOrientationEnumJS;

Return Value

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

Reference

WebTwainDeviceJS Class
WebTwainDeviceJS Members