Bill,
Assuming you are referring to Microsoft Document Imaging Format, it would
seem they are binary files, based on TIFF.
You can open then with VBA, the same as any binary file

Open "YourFile.mdi" for binary #1

However, you need to understand the file's structure in order to make sense
of it. Probably not for the faint hearted..
http://www.google.co.uk/search?hl=en...G=Search&meta=

Other solutions would depend on what you trying to achieve.

NickHK

"BillCPA" <Bill @ UAMS wrote in message
...
Is there some way in VBA to open and read data from an .MDI file?

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Bill @ UAMS