This is a very rudimentary Webcam program written in C#.  It uses Windows Image Acquisition (WIA) with .Net interop to grab images from a QuickCam 4000, or possibly from other devices with WIA video support.  It lacks many of the customization options end users would want, but someone with a C# compiler and just a little bit of programming experience would likely be able to customize for specific needs.

The Basics:

• It snaps still images from the QuickCam at a user customizable interval and stores them in a local directory of raw images.  These raw images are retained for 1 week after which they are automatically deleted.
• For each image, the current date and time are drawn into the lower left corner, and this enhanced version of the image is placed in a web-accessible location as a JPEG file.  Any existing JPEG file already in that location is overwritten.
• When it is night time the program goes into a sleep mode, and no pictures are taken until morning.
• If the user specifies an archive directory, the program will copy one image per day to that directory.

Limitations:

• The definition of "night time" is for Seattle WA, and is built into the program.  A programmer would need to modify this.
• Archiving happens once per day at 9 AM.  A programmer would be needed to change this.
• It works well with a QuickCam 4000, but not the QuickCam 3000.  The problem with the 3000 is that the images are too small, and I don't know if WIA can control that.. anyone?

Usage: 

• First create a dedicated directory for the raw images, and if you like, another one for the archived images.  IMPORTANT: The raw images directory must be dedicated to the webcam, and not be used for any other purpose.  This is because the app will automatically delete images in that directory which are more than 1 week old.  In particular, never use a common directory such as "My Pictures" to collect raw images unless you want all your pictures deleted.
• It's a console app.  Run from a command line or batch file.

  simplewebcam outdir interval destination [archivedir]

• outdir: The dedicated local directory you created where all the raw pictures will be stored for 1 week, then deleted.
• interval: Time between pictures in milliseconds. For best results use a number like 15000 (15 seconds) or larger.
• destination: File path and name of web accessible JPG file. This should end in '.jpg'  It may be a UNC path.
• archivedir: If you specify this directory, one image per day will be archived there.  Do not use the same directory as outdir. 
• To quit the program: press the Enter key.

Downloads:

• Binary. Just unzip and run.
• Source

Reference:

• Code Project article: WIA Scripting and .NET

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