PNG File Comments

PNG has MMX optimized code for loading and saving files, and it supports comments. Comments can be saved when saving a PNG file, but comments inside existing files cannot be updated. The following comments are supported:

Value	Meaning
RasterCommentMetadataType.Artist	Person who created the image.
RasterCommentMetadataType.Copyright	Copyright notice.
RasterCommentMetadataType.DateTime	Date and time (YYYY:MM:DD HH:MM:SS). The field length is 20, counting the NULL terminator.
RasterCommentMetadataType.Description	Description of the image.
RasterCommentMetadataType.Make	Manufacturer of the equipment used to create the image.
RasterCommentMetadataType.Title	Title of the image.
RasterCommentMetadataType.Software NOTE: If you are using the Nag version of Leadtools.dll, this comment is fixed and cannot be changed.	Name and version of software package used to create the image.
RasterCommentMetadataType.Disclaimer	String containing the disclaimer of the software used to create the image.
RasterCommentMetadataType.Warning	Warning statement associated with the software that created the image.
RasterCommentMetadataType.Misc	Miscellaneous information.