LockedTabChange=0
TabEnterDirChange=2
Then, lock some tab and try to open a subdirectory in it. You will be asked:
Where is the question???The tab is locked!
OK/Cancel

Moreover, I cannot edit this message box and add the question by myself, because of the following two reasons:
1. The message used in this message box is taken (as I could determine) from line 1551: from the beginning till the first exclamation mark. The whole line 1551 is used when closing a locked tab ("This tab is locked! Close anyway?"). So, I cannot change the first message box so that the second didn't change.
2. The message must be different for different values of LockedTabChange (see help for details). So, for example, if LockedTabChange=0, one should be asked "Do you want to create a new tab?" As the line 1551 is single, I cannot combine all variants into a single one.
As for me personally, this is only a cosmetic bug, as I know what all this means and what will OK and Cancel make. But for some newbie it can be a problem to find out, what TC asks about...