Powerpoint Image Metadata

[Guest]

Is it possible to, via C#, modify the "Web" "Alternative Text" entry of an
image? I'm pasting images into powerpoint from C# and I need to tag them with
metadata in some way. I've tried using Steganography but no mater how I get
an image (any format, even as link) into powerpoint, whenver I retrieve it
the image has been modified and I can longer retrieve the metadata.

 

[Steve Rindsberg]

Is it possible to, via C#, modify the "Web" "Alternative Text" entry of an
image? I'm pasting images into powerpoint from C# and I need to tag them with
metadata in some way. I've tried using Steganography but no mater how I get
an image (any format, even as link) into powerpoint, whenver I retrieve it
the image has been modified and I can longer retrieve the metadata.

Rather than messing with web/alt text, why not tag the images using tags? ;-)

Every shape on a slide, slide in a presentation and the presentation itself can
have pretty much any number of named tags you like.

In VB/VBA, you'd do this, assuming a reference to the image in oSh

oSh.Tags.Add "TagName", "Tag Value"
' tag name and value are both strings

Debug.Print oSh.Tags("TagName")