Gets the TWAIN version supported by device.
var instance = new Vintasoft.Twain.WebTwainDeviceJS(deviceName, productFamily, manufacturer, driverVersion, twainVersion, deviceManager, is64Bit);
var value; // Type: string
value = instance.get_TwainVersion();
function get_TwainVersion() : string;
Return Value
The TWAIN version supported by device.