void main()

{
    object oTarget;

    // Get the PC who is in this conversation.
    object oPC = GetPCSpeaker();

    // Unlock and open "crbthm1b_0".
    oTarget = GetObjectByTag("crbthm1b_0");
    SetLocked(oTarget, FALSE);
    AssignCommand(oTarget, ActionOpenDoor(oTarget));
}