How to create a control in C++ (Tutorial)

I recently needed to create a control to display graphs and decided to investigate the C++ engine source code. And as it turned out it is not that hard. So I wonder if some of you guys are interested in a tutorial about this.

Here is a snapshot of a simulation where I use the control (an early version).


Example of script code to add data to the graph:

function clientCmdOnDataLineReceived(%dataPos, %dataVel)
{
  tlBallPos.addRow(0, %dataPos);
  tlBallVel.addRow(0, %dataVel);

  [b]DataGraph.addPoint(getWord(%dataPos,0)/1000, getWord(%dataPos,3))[/b];  
}

Please let me know what you think.