Hi Larry, scripting interface for cplanes is as follows:

moi.view.setCPlane( Frame, ApplyToAllViews, OrientOrthoViews ); - takes a required coordinate frame parameter, optional boolean parameter for whether to apply to all views or 3d view only, and optional boolean parameter for whether to orient ortho views or keep them in world.

moi.view.getCPlane(); - returns coordinate frame for the active cplane.

moi.view.setCPlaneInteractive(); - runs the user interactive method for setting the cplane same as pushing the View > CPlane button.

moi.view.resetCPlane(); - sets the current cplane to world.

- Michael