He he, well it would really help if you say that 
So we do this for Webcam 7 Pro then.
Webcam do not support onvif. webcam was created for usb cams in the good old days. Netcam Studio is the next generation that focus on IP cans, but you can also add usb cams.
So I am not sure what you have more than this camera, but ether you can go to Netcam Studio and connect using onvif and add your other cameras or stay with webcam 7 Pro and do the following.
To connect and IP cam to webcam 7 that is not in the list you need to install the Moonware Universal Source Filter. This filter or function is built into NCS. You find more info about the filter here Universal Source Filter - Moonware Studios
You download the filter from here webcamXP - Webcam and Network Camera Surveillance Software
Install it and read here about how to connect the camera to webcam 7. WebCamXP PRO v5.9.8.7 Build 40125 no Support for WansView W2 IP-Cam
The URL uyou should use is:
-Set stream type to rtsp_tcp
-Address is rtsp://username:password@IPnumber:554/mpeg4
-Henrik