Using Aspose.Imaging for .NET library it is easy To convert To WMF(Microsoft Windows Metafile) from other supported image formats...to WMF JP2 to WMF J2K to WMF JPG to WMF JPEG to WMF PNG to WMF...to WMF EPS to WMF CDR to WMF CMX to WMF OTG to WMF ODG to WMF...