Document Automation APIs to enrich .NET and Java applications to view, edit, annotate, convert, compare, e-sign, parse, split, merge, redact, or classify documents of almost all the popular file formats....中,我們將學習如何為 PDF 文檔添加密碼以保護它們。我們還將了解如何以編程方式鎖定相同的 PDF 文件。繼續閱讀 …...