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!).
The CryptoText encryption library contains COM and .NET components for cross-platform Microsoft Windows text and file encryption on Pocket PC and Desktop, including components for components for dotNet, .NET CF, COM / ActiveX, PocketPC.
X360 Video Player Lite ActiveX Control helps application developers to fully control the audio and video stream. Play, pause, resume, stop, loop the stream. Flip and mirror the videos. Control the playback rate and adjust the volume and balance.
Polar Zip Light is free ActiveX control which adds data compression functionality to your Windows applications. It performs adding, extracting, deleting and listing files in archives.