Lock journal through scripting

[#1]

In recent versions of JMP we now have the option to lock journals. How can I incorpoerate that into my scripts? I expect it to be something like:

current journal() << lock;

[#2]

Did anyone ever find a way to do this? I had the same assumption, that the syntax would be similar to what you put, but it doesn't work. I also tried the following and none of them worked either, all of them result in an error. 

current journal() << Lock(1);
current journal() << LockJournal;
current journal() << LockJournal(1);
current journal() << SetLock(1);

Error Message:Object 'HeadBox' does not recognize the message '<command>';

I did notice if you look at the "Customize" -> "Menus and Toolbars" window, that the "Edit" -> "Lock Journal" menu command has a Built-in Command of "EDIT:LOCK JOURNAL", but I cannot figure out a way to get the script to run the built in command. I tried these but none worked. 

Current Journal() << Main Menu("EDIT:LOCKJOURNAL");
Current Journal() << Run Script( Main Menu("EDIT:LOCKJOURNAL"); );

Error Message: Object 'HeadBox' does not recognize the message 'Main Menu';

I also tried to run this with Journal as active window. Command executes, but doesn't lock the Journal

Main Menu("EDIT:LOCKJOURNAL");

[#3 · Accepted solution]

The journal window has to be the active window.  This works for me.

Window( "Journal: Untitled" ) << Bring Window to Front;
Wait( 0 );
Main Menu( "Lock Journal" );

Edit:

There's a better way.  You can specify the window within the Main Menu() function.

Main Menu( "Lock Journal", "Journal: Untitled" );

[#4]

Great, and a little more generic with code references that might be used in other parts of the script:

text box("abc") << journal;
jrn = Current Journal();
Main Menu( "Lock Journal", jrn << get window title);

[#5]

On my computer atleast, this works on JMP 17 but for JMP 18 it failed. Fortunately it looked like a timing problem. This worked:

text box("abc") << journal;
jrn = Current Journal();
Wait(0);
Main Menu( "Lock Journal", jrn << get window title);