Script to unlock a door

[Xavier2]

What is the script to unlock a door using a global plot number? I.E. Unlocks the door after GlobalNumber = 3? Where should i place it in the door utd?

[Darth333]

void main()
   {
   if(GetGlobalNumber("BLA_BLA") == 3)
{
//identify the door or force field you want to unlock
      	 object oDoor = GetObjectByTag("my_door");

//unlock the object
       	SetLocked(oDoor,FALSE);
    	 }
   }