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Hi there I feel confident that this is possible, and I have searched, but am unable to find how to do this. Brief: My database contains blobs which represent attachments that users have attached. I have a button "open attachment". This button should then, well, open the attachment using whatever programme is defined in the registry as the default programme to open the attachment. WHere I have got to: I can attach the blob. I can then write it out to a temporary directory using the original file name. I can get the file type from the registry using the extension of the filename I write out. What I can't figure out how to do: Lookup the registry and get the associated programme based on the filetype to launch the file. All help appreciated Clark