Here is the simple Grasshopper definition [GHX: 0.9.0072] that activates Rhinoceros’ camera by given parameters. Camera position is determined by the “point-oriented” method here. This means that you have to have a target point for the camera first. In fact, I was trying to find a suitable command for getting the actual camera position of the Rhinoceros but I think it is impossible (for now). I couldn’t track the camera object by its ID number also. There are some Grasshopper components that deal with this issue, however.

The simple code inside the vb.net component creates a camera with given input points.  This code might also be useful to create a camera animation in Grasshopper.