[SCRIPT] Need help with several scripts.

[Cruzore]

use a global/local variable(depends on where you use the item)that is normally 0 and 1 when that item has been picked up, and initiate the callback only if that variable is 0.
Example:
void OnStart()
{
SetGlobalVarInt("CallbackVariable1", 0);
}
void UsedKeyOnDoor(syntax stuff)
{
SetGlobalVarInt("CallbackVariable1", 1);

}
void DisplayText(string &in asEntity)
{
if(GetGlobalVarInt("CallbackVariable1")==0)
{
SetMessage("Locked", "Basement", 0);
}
}
It should also work if you set the if for the callback itself, not the called function