I'm not sure I understand what your question is. There are many examples that ship with NI-IMAQ. See "C:\Program Files\National Instruments\NI-IMAQ\Sample\MSVC" All default to the image interface 'img0' (note the lower-case 'i'). If you go to Measurement and Automation Explorer (MAX), you can double check the interface name by selecting your camera and looking at the name attatched to the end. By default it will create an interface called 'img0'. If this is not the name you are seeing, you will need to change the example programs to match the interface name shown in MAX.
