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Document properties, Security and Signatures

Version history

This function was renamed in Quick PDF Library version 7.11.

The function name in earlier versions was Unencrypt.


This function attempts to remove the encryption setting from the selected document using the password provided when originally opening the document.

This function will succeed even if the user password was used (including an valid blank password) rather than the master password. Developers are advised that they should respect the security wishes of the document's author.



function TDebenuPDFLibrary1511.Decrypt: Integer;


Function DebenuPDFLibrary1511.PDFLibrary::Decrypt As Long


int DPLDecrypt(int InstanceID)

Return values

0 The document could not be decrypted
1 The document was decrypted successfully

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