Parameters

Return value

User access permissions:

Bit position	Meaning
1-2	Reserved; must be 0.
3	(Revision 2) Print the document. (Revision 3 or greater) Print the document (possibly not at the highest quality level, depending on whether bit 12 is also set).
4	Modify the contents of the document by operations other than those controlled by bits 6, 9, and 11.
5	(Revision 2) Copy or otherwise extract text and graphics from the document, including extracting text and graphics (in support of accessibility to users with disabilities or for other purposes). (Revision 3 or greater) Copy or otherwise extract text and graphics from the document by operations other than that controlled by bit 10.
6	Add or modify text annotations, fill in interactive form fields, and, if bit 4 is also set, create or modify interactive form fields (including signature fields).
7-8	Reserved; must be 1.
9	(Revision 3 or greater) Fill in existing interactive form fields (including signature fields), even if bit 6 is clear.
10	(Revision 3 or greater) Extract text and graphics (in support of accessibility to users with disabilities or for other purposes).
11	(Revision 3 or greater) Assemble the document (insert, rotate, or delete pages and create bookmarks or thumbnail images), even if bit 4 is clear.
12	(Revision 3 or greater) Print the document to a representation from which a faithful digital copy of the PDF content could be generated. When this bit is clear (and bit 3 is set), printing is limited to a low-level representation of the appearance, possibly of degraded quality.
13-32	(Revision 3 or greater) Reserved; must be 1.

Note: Revision 2 means el40bitRC4 is used as the DocumentEncryption's value. Revision 3 means el128bitRC4 is used.

For example:

• Setting value FFFFF4C0 (hex) is identical to setting the AllowChangeDocument property to the AllowedChangesAllowLevel1Changes value.
• Setting value FFFFF1E8 (hex) is identical to setting the AllowChangeDocument property to the AllowedChanges AllowLevel4Changes value.
• Setting value FFFFFFFC (hex) allows all.
• Setting FFFFF0C0 (hex) dissallows all.

See the UserPassword property for examples.