str_cpy(BuildString, "bmap = NULL;");
str_cat_num (BuildString, "size_x = %4.0f",bmap_width(overlaybmaps[currentdex]));
str_cat_num (BuildString, "size_y = %4.0f",bmap_height(overlaybmaps[currentdex]));
//what ever else you need for the panel here
MyPan = pan_create(BuildString,42);
MyPan.bmap = overlaybmaps[currentdex];