How to get the File-Type from a BLOB-Column

Hi all,
I have the database table with the BLOB-Column. In this column are Word/Pdf/Excel/... files can be stored.
Now I want to open these Files from Webforms.
I can download the file from database to the client and then open the file with client_ole2.CREATE_OBJ('Word.Application');
But I can not be sure that the file is a Word-Document.
How can I know which application is saved in the BLOB-column?
Regards

Hi Francois,
thank you.
Unfortunatelly I do not know the interMedia functions. Can you send me an example with interMedia?
I am working with your solution with WEBUTIL_HOST.blocking.
But when I do not give the extension for the file, in that the BLOB will be temporary stored, I get to see the Windows "Select Program..." window. When I select Word or anything else then the file will be opened, but the locking does not working.
Any ideas?
Regards

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