For Windows Vista, this update gives a per format switch to control the parsing of each file format in GDI+. As a part of this release, a new feature is added to GDI+. This new feature enables you to control the parsing of different codecs. The idea behind the feature is to control the attack surface area. This feature is controlled by using different registry entries that are part of this update. By changing these registry entries, you can control which images are parsed and rendered and which images are rejected in GDI+. For example, you can select to parse and render Joint Photographic Experts Group (JPEG) images, but block Tagged Image File Format (TIFF) images.