TL:DR; PDFLock - A developer dll for setting all security options, main- and user-password, encryption type .
PDFLock - A developer dll for setting all security options, main- and user-password, encryption type ... Royalty free! Easy to use! For all well known IDEs (.NET, too!).
Suite components allow you to send and receive mail, including HTML and MIME attachments, from your applications, download and upload Internet resources over most popular protocols.
Serial Port Control is an inexpensive royalty-free component. It supports VB, VB.Net, C#, Borland Delphi, Borland Builder. Just put it on a form and you`ve got all the functionality you need to access an RS232 port.
Rapidly develop high performance, trouble free barcode recognition and image manipulation applications. Easy to integrate and to use, ClearImage tools tackle heavy duty, production applications, and can read poor quality scanned or faxed images.