PDF .NET Library Documentation - PDF Technologies, Inc.
Assembly: PDFTechLib (in PDFTechLib.dll) Version: 1.0.0.0 (1.7.9.0)
If set, the field is intended for entering a secure password that should not be echoed visibly to the screen.
Namespace:
PDFTechAssembly: PDFTechLib (in PDFTechLib.dll) Version: 1.0.0.0 (1.7.9.0)
Syntax
Remarks
Characters typed from the keyboard should instead be echoed in some unreadable form, such as asterisks or bullet characters.