[Plplot-general] how to know (get) current attribute of a graph (line width, color ...)

[Alain B. <ala...@la...>]

Dear all

i 'd like to create my function for drawing the legend of graph,
i want to modify line width for the legend, and font color and reset
 to previous value before exiting the legend function. so i need to know
 current line width, line color

I found no function that gives me this informations (no plg...)
Am i wrong ? 
how could i get this information ?

Regards
Alain baeckeroot