Hello,
you have to build the direct URL to the camera picture, if the camera supports still-pictures (JPEG) or the direct URL to the camera stream, if the camera streams the video in MJPEG or in the MPEG4 format!
Here are sample addresses from further camera models:
http://www.crazypixels.com/support.htm
In the program you have to select in which mode the camera is running!
Java applets or ActiveX components are not supported.