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!).
Sound Volume SDK adjust master , microphone volume in window 7 , vista. support control Master Volume, Wave, CD Audio, Line In, Microphone, Phone Line, PC Speaker, SW Synth volume.
For Professional Windows Developers who need to provide video/audio playback function within their business application.Support RM, Mov, Divx, AVI, WMV, MPEG-1, ASF, WAV, MP3, MID file playback.Audio Pitch and tempo adjustment.
Powerful media player, video player activex - Mov, M4a, Mp4, 3gp, Divx, AVI, WMV, MPEG-1, MPEG-2 (need dvd decoder), RM, ASF, WAV, MP3, MID file playback.Video Mixing, change audio pitch, Overlay text, image, scrolling type, alpha value on video.