Get chart' size at runtime and set particular scroll position

Hello,

Another thread without response on the subject : Size of Charts

Context : In a program, we have a GL_GUI_BARCHART object with 3 charts created with the method CREATE_CHART.

1. I have to set the size (Height) of the previous graphs modified by the user when he starts again the program.
2. I have to set the scroll at a certain position for 2 Graphs.

Problem :

1. I can't find a way in the CL_GUI_BARCHART class to get the references of the 3 graphs and so i can't read their size at runtime in a OO way...I know it's inherited from CL_GUI_CONTROL but the method GET_HEIGHT returns nothing...
2. Is it even possible?

Thanks for your time

Regards,

Alexandre