Aldus Placeable Metafile

Aldus Placeable Metafile (APM) is a container format for Windows Metafile format. It adds a header that supplies suggested placement and scaling information.

Format
APM files have a 22-byte header, followed by a standard Windows Metafile.

Identification
Files begin with a 4-byte signature:.

Links

 * Microsoft support: Windows Metafile Functions & Aldus Placeable Metafiles
 * MSDN: WmfPlaceableFileHeader structure
 * http://wvware.sourceforge.net/caolan/ora-wmf.html