Can customization be added on byte stream

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Hi

I have hundreds of word documents in sql server as blob on image column (without VSTO customization). Do I need to save the blob as a file on server's file system before I can attach customization on the file?
ServerDocument.AddCustomization seems to work only for files.
If I read the file from SqlServer as byte, can the customization be attached to it without saving it as file?

Janne
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