Adventure Game Studio

So I am working on this hotspot that will have this message that will appear only once, I tried using Int but several errors keep popping up like undefined Int. I was wondering how do I define this Int, and see if there is any other problems in my coding.

Thank you in advanced.

[CODE=ags]
function room_Load()
{
Int Guardroom = hHotspot5_AnyClick ();
}

{
  if (Guardroom == 0) {
    cToyf.Say("placeholder Dialog.");
    Display("Evil Dialog");
    cToyf.Say("Pain dialog");
    Display("Feeling weak Dialog.");
}
if (Guardroom == 1) {
  cToyf.Say("It's the security room. Currently it's locked.");
 
  Guardroom +=1;
}

[/CODE=ags]

It is "int" (lowercase), not "INT". AGS script is case sensitive (as most of the scripting and programming languages I knew).

Other than that, if the script you posted is your actual script from game, it won't work that way. You are defining a local variable "Guardroom", that will exist only inside the function Room_Load. If you want to use this variable in other functions, declare a global variable instead, outside of any function.
http://www.adventuregamestudio.co.uk/wiki/Scripting_tutorial_part_1#Variable_Scope

You can use Game.DoOnceOnly():

function hHotspot5_AnyClick() {
  if (Game.DoOnceOnly("guard room")) {
    cToyf.Say("placeholder Dialog.");
    Display("Evil Dialog");
    cToyf.Say("Pain dialog");
    Display("Feeling weak Dialog.");
  }
  else {
    cToyf.Say("It's the security room. Currently it's locked.");
  }
}

I have used "guard room" as parameter, but it doesn't matter what you put, as long as you don't use the same text elsewhere in your game.

Using an int:

int guardRoom = 0;

function hHotspot5_AnyClick() {
  if (guardRoom == 0) {
    cToyf.Say("placeholder Dialog.");
    Display("Evil Dialog");
    cToyf.Say("Pain dialog");
    Display("Feeling weak Dialog.");
    guardRoom++;
  }
  else {
    cToyf.Say("It's the security room. Currently it's locked.");
  }
}

I'll also recommend naming your hotspots before creating the event functions; you'll get hSecurityRoom_AnyClick which is a lot more readable. You can still rename the function in the event list and script though.
Also, is there a specific reason why you're using AnyClick instead of LookAt?