A Metafile is a type of file that can store variety of data. You can add .emf and .wmf images to your word documents. Following code shows the use of DrawMetafile method to draw a metafile image in a Word document:

Dim img As Image = Metafile.FromFile(dlg.FileName)
C1Word.DrawMetafile(DirectCast(img, Metafile))

Image img = Metafile.FromFile(dlg.FileName);
C1Word.DrawMetafile((Metafile)img);