TNEF

The TNEF application was designed to be a small program that attempts to extract usable files from the dreaded "Content-Type: application/ms-tnef" Microsoft Outlook "Transport Neutral Encapsulation Format". I made no attempt to learn the structure of this format. I only noticed that the files in it are intact. All this program really does is try to extract embedded files based on the
detection of common file headers.

In operation, you would save any tnef attachment to disk, then either drop the saved file on the TNEF.EXE program (or a shortcut to it), or start the TNEF.EXE program and
enter the address of the file. You might also try associating the "application/ms-tnef" MIME type with this TNEF.EXE program if given the opportunity to do so by your email program.

Because random file data can contain several instances of a file header (even if it isn't that kind of file), this program is GUARANTEED to give false file extractions. It is kind of assumed that if someone sends you a message saying "see the attached Word document" and this program detects 3 bitmaps, a GIF file, two WRI files, and a Word
document, you can ignore and delete everything except the Word document you were expecting.

If you want to cut down on the number of false detections, don't tell the program to try to extract anything you don't expect to get as an attachment.

When the program first starts up, it knows how to recognize headers for 14 different file formats. If you decide you want to recognize a different file format, all you have to
do is edit the INI file. For example, to detect Adobe Acrobat documents, you might set "Extension13=PDF" and "Header13=%PDF" because they all start with %PDF. Open one up with Notepad and see for yourself. Of course, if you set 13 for PDF documents, you lose detection for AVI files, but that's up to you. Pick whatever you don't use and change it to something you do use.

When the program is set to "Launch" or "Explore" extracted files, it puts the files in a subdirectory of the TEMP folder. This is typically "C:WindowsTemp" in a subdirectory
named something like ~tnef1, ~tnef2, ~tnef3, etc.. These files are not deleted after the program finishes. It's up to you.