Gets the marker number of a symbol. The symbol needs to be a symbol and registered with the PlotSetMarker() function.
The library name and symbol name ("Library.Symbol") of the symbol that is registered as a marker.
The marker number if successful, otherwise -1 is returned.
PlotMarker, PlotScaleMarker, PlotSetMarker
/*Assume that the symbol was registered by PlotSetMarker function */
/*Later on, this symbol can be used as shown below*/
hPlot = PlotOpen(36,"Display",1);
/* Display red hourglass as marker at point (100,200) on AN36. */
MarkerNo = PlotGetMarker("Global.Hourglass");