Webcam program for Windows 7

I have a Windows 7 based computer. I want a fully functional program called by a command from another program([login to view URL]) to take a video (Audio too) for a set amount of seconds using a built in webcam. The webcam is a HP High Definition webcam. The files will be saved in a selected folder. Once the file is saved, the program will remain running but not active and return control back to the calling program.