Gets the maximum height that your app window can be. For platforms that support windowed mode such as Windows and Mac your app can only achieve this size in full screen mode as windowed mode has a border around your app. For HTML5 apps this will return the size of the current HTML document, and is not guaranteed to work if the HTML5 app is running in full screen mode. A better name for this command would be GetMaxWindowHeight, but it is now set in stone.
integer GetMaxDeviceHeight()