[Gretl-users] Saving plot/graph C/C++ api

Hello I would like to save a plot/graph as a .png file using the c/c++ api. In order to do this do I need to use header files from the gui folder. In particular do I need to use gpt_control.h, and session.h? If there are an examples on how to save plot/graph as a .png file that would be great, if not an overview on how to go about doing it would be much appreciated. Thank you Ryan