Hrm, you'll need to be more specific about your actual question in order for us to give you a good answer, but, without more information, I'd say you should just define the type as a 2-d array of either longs or words. (i.e. get an array constant, place a numeric constant inside of it, right click the numeric constant, and select Representation->Long or Representation->Word then wire the constant to the Type input of the Variant to Data).
If you're dealing with variants, I'd guess you are probably calling an ActiveX control or server to communicate with your camera?
Regards,
Ryan K.