Hello Zener,
The example programs located at \samples\userint\custctrl\cviogl\ are the primary documentation provided. I would recommend looking over the "simple.prj" and "ogldemos.prj" projects located in that directory for examples of how to use the OGLPlot3DScatter function. If you have further questions on the use of the OpenGL control, you may contact us at http://www.ni.com/ask. However, our support for this custom control is limited.
Jeremiah Cox
Applications Engineer
National Instruments
http://www.ni.com/ask