Copies the comment from a buffer into a specified enhanced-format metafile.
A comment may include any private information — for example, the source of the picture and the date it was created. A comment should begin with an application signature, followed by the data. Comments should not contain position-specific data. Position-specific data specifies the location of a record, and it should not be included because one metafile may be embedded within another metafile. This function can only be used with enhanced metafiles.