The normal way to access the dialog is through a menu entry or control button belonging to the application program. For example, VidCap32, has three menu entries - Options-> Source..., Options -> Format..., and Options -> Display... that access respectively the Source, Format, and Closed Caption pages of the dialog. Once you are in the dialog, you can move to any other page by clicking on its tab.
Another way to access the Configuration page is through the Control Panel.
Instructions for Windows NT 4.0
You can open the dialog through the Control Panel at the same time another application is accessing the card. This is useful if the application does not provide an access control to the dialog. When you open the dialog through the Control Panel, some changes such as adjustments to brightness, contrast, etc. display immediately. Others will not take effect until the application is restarted.