Windows Metafile

(redirected from Windows Meta File)

Windows Metafile

The native vector graphics file format in Windows. Windows Metafiles also can hold bitmaps and text. The original 16-bit format uses the .WMF file extension. The subsequent 32-bit format, which supports more sophisticated graphics functions, generates .EMF (Enhanced MetaFile) files.

Actual Drawing Commands
WMF and EMF files are made up of Windows drawing commands (GDI calls), which results in an efficient format that renders illustrations very quickly. Metafiles are also used by programs to hold data between sessions, and Windows uses it for temporary storage in the Clipboard.

Standard and Placeable Versions
The standard WMF file uses an 18-byte header followed by GDI command records. There are two additional WMF variations that place another header in front of the standard header. A Placeable Metafile uses a 22-byte header containing x-y coordinates for positioning the image on the page. A Clipboard Metafile uses an 8- or 16-byte header. In an EMF file, all header information, including Placeable and Clipboard data, is stored in the first GDI command record.
References in periodicals archive ?
In January, an outside patch was created for a vulnerability in the way Windows renders Windows Meta File images, and in March, two security companies issued patches for a bug related to how IE handled certain tags in Web pages.
Internet Security Systems (ISS) (NASDAQ:ISSX), a managed security services company, has announced that the company pre-emptively protected customers from the latest Windows Meta File vulnerability patched last week by Microsoft.
ISS) (NASDAQ: ISSX) today announced that the company preemptively protected customers from the latest Windows Meta File vulnerability patched today by Microsoft.
A, which takes advantage of a leading IM network to spread the newly discovered Windows Meta File (WMF) vulnerability on users' PCs.
the leading provider of security solutions, announced today that its platform technology protects against Microsoft Windows Meta File (WMF) malicious attacks.
AUSTIN, Texas -- TippingPoint, a division of 3Com and the leader in intrusion prevention, today announced that its TippingPoint(TM) Intrusion Prevention Systems (IPS) provide protection for all bulletins announced by Microsoft today, including the zero day vulnerability in Internet Explorer when processing Windows Meta Files (WMF).