Secure PDF 2026 API Changes

Upgrading from a previous version is usually as simple as referencing the updated library versions. We have minimized breaking changes to ensure a straightforward upgrade process. However, the release of Secure PDF 2026 includes several API changes that may require code changes. The table below lists the changes between Secure PDF 2024 and Secure PDF 2026.

Please contact us at support@nsoftware.com with any questions or comments.

PDFSign
PDFVerify

API Changes

The table below describes API changes in Secure PDF 2026. Please refer to the notes for each entry for details.

PDFEdit
	Property	`PDFAConformanceLevel`	New
	Method	`AddAttachment`	Adds an `AttachmentType` parameter
	Event	`FontLookup`	New
PDFForm
	Property	`PDFAConformanceLevel`	New
	Method	`AddButton`	Parameter `Name` renamed to `FieldName`
	Method	`AddCheckBox`	Parameter `Name` renamed to `FieldName`
	Method	`AddComboBox`	Parameter `Name` renamed to `FieldName`
	Method	`AddListBox`	Parameter `Name` renamed to `FieldName`
	Method	`AddRadioButton`	Parameters are now `FieldName`, `RadioGroup`, `IsDefaultButton` (previously `RadioGroup`, `Name`, `IsDefaultButton`)
	Method	`FindField`	Parameter `Name` renamed to `FieldName`
	Method	`RemoveFieldByName`	Parameter `Name` renamed to `FieldName`
	Method	`SetPage`	Removed
	Method	`SetPosition`	Adds a `PageIndex` parameter
	Event	`FontLookup`	New
PDFSign
	Property	`PDFAConformanceLevel`	New
	Property	`RemoteSignatureData`	New
	Property	`RemoteSignatureDigest`	New
	Property	`RemoteSignatureMethod`	New
	Method	`AddAttachment`	Adds an `AttachmentType` parameter
PDFVerify
	Property	`PDFAConformanceLevel`	New

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