how to pass nt password ?

I succesfully pass username , domain and password via this function (taken
from MSDN)

Private Declare Auto Function LogonUser Lib "advapi32.dll" (ByVal
lpszUsername As [String], _

ByVal lpszDomain As [String], ByVal lpszPassword As [String], _

ByVal dwLogonType As Integer, ByVal dwLogonProvider As Integer, _

ByRef phToken As IntPtr) As Boolean

Dim returnValue As Boolean = LogonUser(username, domain, pwd,
LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, tokenHandle)

The above assumes that in the application, user will be required to enter
username, domain and password via keyboard

However i do NOT want the application to ASK user for the username,domain
and password. Instead the application shld use the current user context
since users already logon to a operating system eg XP.

i can extract username and domain using the WindowsIdentity.Name Property
which give it as domain\nt id, and then i pass to above function in
username, domain.

How do i extract password ? I know password cannot be seen, but at least
what can i do to pass the current password arguments into the above
function - logonuser ?










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