APM (Aldus Placeable metafiles)

Placeable Metafiles were created by Aldus Corporation as a non-standard way of specifying how a metafile is mapped and scaled on an output device. Placeable metafiles are not directly supported by the Windows API.

To playback a placeable metafile using the Windows API, you will first need to strip the placeable metafile header from the file. This is typically performed by copying the metafile to a temporary file starting at file offset 0x16. Adobe now holds the patent on this technology.