hi,

open the code and copy the following below:


SetIndexStyle(0,DRAW_HISTOGRAM, 0, 5, Red);
SetIndexBuffer(0, ExtMapBuffer1);
SetIndexStyle(1,DRAW_HISTOGRAM, 0, 5, DodgerBlue);
SetIndexBuffer(1, ExtMapBuffer2);
SetIndexStyle(2,DRAW_HISTOGRAM, 0, 5, Red);
SetIndexBuffer(2, ExtMapBuffer3);
SetIndexStyle(3,DRAW_HISTOGRAM, 0, 5, DodgerBlue);
SetIndexBuffer(3, ExtMapBuffer4);


the above should accomplish your goal
let me know

mwbro