How can I find/access login.msc?

In default.html, the hidden form's action is equal to login.msc which uses the parameters user and password (see below). How/where can I find login.msc? Can I get access to the contents of this file?

<form action="login.msc" method="post" name="loginform">

<input type="hidden" name="user">

<input type="hidden" name="password">

</form>

<form action="login.msc" method="post" name="newwinform" target="messenger_express">

<input type="hidden" name="user">

<input type="hidden" name="password">

</form>

</center>

[634 byte] By [708293] at [2007-11-25 7:10:55]