




The macro 
with-internal-metafile
  creates a metafile containing records corresponding to the Graphics Ports operations in 
body
 that draw to 
var
.
This is implemented only in LispWorks for Windows. The metafile is a device-independent format for storing pictures. For more information about metafiles, see the Microsoft documentation.
with-internal-metafile
 behaves like with-external-metafile except that an object representing the metafile is returned, and no file is created on disk.