What I assume is that you have a text box on a form you've created to enter a password. In that form's INPUT MASK property you put the word Password and it will mask it.
However, if you are talking about an Access generated dialog box due to password protection, then that fix will not work. I'm not sure what you can do for that. I haven't worked with secure databases for several years, so I have forgotten most of what I learned back then.
BL