function Set_Visible(on_off)
{
   my.VISIBLE = on_off;
}

function Set_Visible(on_off)
{
   if (on_of==1) set(my,VISIBLE);
   else reset(my,VISIBLE);
}

ENTITY* testent = {
   type = "some file...";
   skill1 = 2;
   skill2 = 3;
}

var angl[3];
....
angl.pan = 90;
angl.tilt = 180;

VECTOR vec_name; //then use vec_name.x, vec_name.y and vec_name.z
otherwise use ANGLE ang_name; //then use ang_name.pan, ang_name.tilt and ang_name.roll

#define skill1 skill[0]

#define HEALTH skill1; //same as #define HEALTH skill[0]

//then later in your project maybe an action?
action act_bobo(){
   my.HEALTH = 100;
   //same as my.skill1 = 100;
   //same as my.skill[0] = 100;

now you need
set(my, VISIBLE); //which is defined in acknex.h, to set panels visible

//though ENTITIES use reset(my, INVISIBLE);

toggle(my, VISIBLE);

if(is(my, VISIBLE)){ //work you magic

ENTITY* shotgun_onscreen =
{
  type = "shotgun.mdl";
  layer = 2; // display above view entities with layer 1
  flags2 = SHOW; // lite-C only: visible on screen from the start  x = 100; // place 100 quants ahead of the view
  y = -50; // 50 to the right
  z = 0; // and center vertically
}