void main()
{
    string sTag = GetTag(OBJECT_SELF);
    string sTag2 = GetStringRight(sTag, 3);
    SetLocalObject(GetLastUsedBy(), "Window", OBJECT_SELF);

    if(sTag2 == "_01" || sTag2 == "_11")
    {
        ActionStartConversation(GetLastUsedBy(), "window_int", TRUE, FALSE);
    }
    else if(sTag2 == "_02" || sTag2 == "_12")
    {
        ActionStartConversation(GetLastUsedBy(), "window_ext", TRUE, FALSE);
    }
}