I have used PasswordChar on a TextBox that is on a form and it works great.
You see * instead of the password and you can't cut or copy the password
out.  It doesn't work as well for a DataGrid.  If you want to look a list of
users it would be the natural thing to want to hide the password.  The setup
seems to indicate you can set the PasswordChar propery even on a TextBox in
the DataGridTextBoxControl so I assumed it would be ok.  When you go to edit
the value for that column it will show up as the character you provided and
it won't let you cut the value out...but it will let you copy  it...that is
unless you use the context menu to do it.  Is this a known problem?  Will it
be fixed in the next release?  What do I do?  Also...this isn't as big of a
problem because I have the columnstyle overridden and I was able to fix this
myself...the chosen character only masks the value when you are trying to
edit it. If you move the cursor to another cell then that cell that was
previously masked becomes unmasked.

   Thanks in advance for any help you may provide,
                                                                       Brandon