Shoutbox

Good, first of all: Welcome to the forums!

As for your question, you should think of how you want this to be done. Imagine which steps a script should take to get your desired result. Because you're new, I'll help you a bit.

1. You should register the command using a ScriptCommands block in your ScriptInfo.xml file or by using OnGetScriptCommands. I'll assume the command would be "/mycommand " followed by "on" or "off".
   
2. You should capture the event when the user sends the command.
   
3. In that event, you should get a Contact object by checking if there's only one contact in the conversation and then get that object.
   
4. You then should set and save the setting for that contact's email to on or off, depending on the parameter given.

So, in a script it could like like:

code:

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//We need to store the settings somewhere, so I choose an array. This is very inefficient when you need to use them the next time you use Messenger.
var settings = new Array();
//Register the command
function OnGetScriptCommands() {
  var s = "<ScriptCommands>";
  s += "<Command>";
  s += "<Name>mycommand</Name>";
  s += "<Parameters>&lt;on|off&gt;</Parameters>";
  s += "<Description>Turn the script on or off for the current contact.</Description>";
  s += "</Command>";
  s += "</ScriptCommands>";
}

//The event!
function OnEvent_ChatWndSendMessage(ChatWnd, Message) {
  //Check if the message is our command
  //This is a regular expression, read more about these on MSDN
  if(/^\/mycommand\s([a-z]+)$/i.test(Message)) {
    //Make sure there are only two people in the chat (you and someone else)
    if(ChatWnd.Contacts.Count == 1) {
      //Get the contact!
      var Contact = new Enumerator(ChatWnd.Contacts).item();
      var Email = Contact.Email;
      //Save the setting
      //RegExp.$1 stores the first captured string in our command check (the thing between brackets)
      if(RegExp.$1 == "on" || RegExp.$1 == "true") settings[Email] = true;
      else settings[Email] = false;
      //End the event by returning nothing (otherwise Plus! gives an error)
      return "";
    } else return "";
  }
}
//Now you can add a function to load and save the settings, make the script function based on the per-contact settings and anytthing you like else...

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And yes, the coloring took time...