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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@6317 8e941d3f-bd1b-0410-a28a-d453659cc2b4
This demo program reads encrypted xlsx files. File "encrypted_workbook.xlsx" was encrypted in the File menu of Excel 2007. The password is "test". The file "protected_workbook.xlsx" was worksheet-protected in the Inspect menu of Excel 2007. The password "test" was specified, it is not the password used for encryption of the file, it is only needed to unlock worksheet protection.