Proprietary Windows graphic format developed by Microsoft; contains a series of drawing operations, including commands for drawing lines, circles, and rectangles; may also contain bitmap drawing operations; used primarily for vector images, but can also include raster graphics.
WMF files originally appeared in 1988 with the release of Windows 2.0. Microsoft later published the WMF file format specification with the Windows 3.1 release in 1992, and then published a subsequent specification in 2006.
WMF files have largely been replaced by more standard formats, such as .JPG and .GIF images. The WMF format is still supported by various programs, including Microsoft's Windows Photo Viewer, which is included in Windows 7.