Impersonation

[i gr8]

Hi, I have used below code to log in to my network drive, before using this code every time when i manually access the network folder it asks me credential to login. But after executing this code the network drive is not asking for any credential when i manually locate to the network drive. Any idea what is happening

[DllImport("advapi32.dll")]
public static extern int LogonUserA(String lpszUserName,
String lpszDomain,
String lpszPassword,
int dwLogonType,
int dwLogonProvider,
ref IntPtr phToken);
[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern int DuplicateToken(IntPtr hToken,
int impersonationLevel,
ref IntPtr hNewToken);

    \[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)\]
    public static extern bool RevertToSelf();

    \[DllImport("kernel32.dll", CharSet = CharSet.Auto)\]
    public static extern bool CloseHandle(IntPtr handle);