You can use the PlotAreaMouseMove event and then test for a plot using the hit testing methods we make available.
  private void waveformGraph1_PlotAreaMouseMove(object sender, MouseEventArgs e)
        {
            {
                XYPlot plot = waveformGraph1.GetPlotAt(e.X, e.Y);
                if (plot != null)
                    Debug.WriteLine("over plot");               
            }
        }
You can also use the HitTest methods available on the graphs. See the help for more information. 
					
				
			
			
				
	Bilal Durrani
NI