I wanted to make a vb.net version of this trick used to hide files in pictures:
http://www.online-tech-tips.com/computer-tips/hide-file-in-picture/
I don’t have any idea on how to do this, but first is it possible?
In my mind I have to use an open file dialog box to do this.
The technique you are talking about is called Steganography, if you are talking about hiding files, there is an excellent article about this on CodeProject, and how to do it. The article covers a framework on how to achieve what you are looking for, in fact, if you check the author’s articles, you will see that the author has written numerous articles covering all aspects of steganography.
Hope this helps,
Best regards,
Tom.