Same error message return for wrong password and account locked

[Stephen]

Hi all,

I've used the following method to check for user authenication
(System.DirectoryServices).
But I found that the error message return for both "Invalid password" and
"account lock out" is the same.
Do you know why? Please advice. Thank you very much.

DirectoryEntry de = new DirectoryEntry(path, userName, password)
try
{
string s = de.SchemaClassName;
}
catch(Exception Ex)
{
return false;
}