Prevent opening a file

I am using dsoFramer to open docx files in winforms. When a docx file is opened in dsoframer 开发者_开发技巧and user open the same document from windows explorer, the application becomes unstable. How can I prevent opening the file from windows explorer when it is open in dsoFramer.

Best regards.

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i would create a copy of the file and work from that, if you need to save it then just replace the original with the copy