'Usage
Dim instance As ImGearPDFDocument
Dim securityHandlerName As ImGearPDFAtom
instance.SetNewCryptHandler(securityHandlerName)
Parameters
securityHandlerName
The PDF atom for the name of the new security handler to use for the
document. Use Null to remove security from the document.
Remarks
The security handler will be used after the document is saved. This method returns with no action
if the new security handler is the same as the old one.