As the title, how to achieve this in VSTO?
ctually I just want to use Automation/VSTO to implement "Restrict
permission to content in files". Any idea?
https://support.office.com/en-nz/article/Information-Rights-Management-in-Office-2010-c7a70797-6b1e-493f-acf7-92a39b85e30c?ui=en-US&rs=en-NZ&ad=NZ
Best regards,
Riquel
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