what is windows metafile
Windows GDI+ provides the Metafile class so that you can record and display metafiles. A metafile, also called a vector image, is an image that is stored as a sequence of drawing commands and settings. The commands and settings recorded in a Metafile object can be stored in memory or saved to a file or stream. GDI+ can record metafiles in the EMF and EMF+ formats, but not in the WMF format.
WMF is a file extension for a graphics file used with Microsoft Windows. WMF stands for Windows MetaFile. WMF files can contain both vector and bitmap image information. WMF files were 16-bit when initially included with Windows 3.0. WMF files can be opened by Microsoft Word, PowerPoint or Publisher.