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CreateProcessWithLogonW (advapi32)
 
.
Summary
Starts a new process, opens an application in that process, and uses a passed UserID and Password. The application opened is running under the credentials and authority of the UserID passed.

' this code does not work in vb.net

C# Signature:

[DllImport("advapi32.dll")]
static extern TODO CreateProcessWithLogonW(TODO);

VB Signature:

<DllImport("advapi32.dll", EntryPoint:="CreateProcessWithLogonW", SetLastError:=True, CharSet:=CharSet.Unicode, CallingConvention:=CallingConvention.StdCall)>
Public Shared Function CreateProcessWithLogonW( _
  ByVal lpUsername As String, _
  ByVal lpDomain As String, _
  ByVal lpPassword As String, _
  ByVal dwLogonFlags As Integer, _
  ByVal lpApplicationName As String, _
  ByVal lpCommandLine As String, _
  ByVal dwCreationFlags As Integer, _
  ByVal lpEnvironment As IntPtr, _
  ByVal lpCurrentDirectory As String, _
  ByRef lpStartupInfo As STARTUPINFO, _
  ByRef lpProcessInformation As PROCESS_INFORMATION _
  ) As Integer
End Function

User-Defined Types:

STARTUPINFO, PROCESS_INFORMATION

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

Private Const LOGON_WITH_PROFILE = &H1

Public Shared Function OpenAppAsUser(ByVal username As String, ByVal domainname As String, ByVal password As String) As Boolean

'The Windows NT user token.
Dim lpAppName As String
Dim appExe As SR.[Assembly]
Dim pi As PROCESS_INFORMATION
Dim si As STARTUPINFO
Dim fResult As Boolean
Dim dwCreationFlags As Integer = Nothing
Dim lpCommandLine As String = Nothing
Dim lpEnvironment As IntPtr
Dim lpCurrentDirectory As String = Nothing
Dim ret As Integer

appExe = SR.Assembly.GetEntryAssembly()
lpAppName = appExe.Location
si.cb = Len(si)
si.lpTitle = appExe.GetName().Name

' call the Win32 API to open the application under the userID passed in
' Implicit Integer to Boolean conversion.  CreateProcessWithLogonW returns  0 (False) when it fails.
fResult = CreateProcessWithLogonW(username, domainname, password,    LOGON_WITH_PROFILE, lpAppName, lpCommandLine, dwCreationFlags,   lpEnvironment, lpCurrentDirectory, si, pi)

' if the logon fails then we need to generate an error
If Not fResult Then
   ' get the last error from Windows
   ret = Marshal.GetLastWin32Error

   ' if the userid, password, or domain is bad we can display a friendly message
   If ret = 1326 Then
     MessageBox.Show("Invalid UserID or Password entered.  Please try again.", "Logon Error")
     Return False
   Else
     ' the error code is unexpected so throw an exception to be logged.
     Dim retMsg = GetErrorMessage(ret)
     Throw New MAE.BaseApplicationException("Error occurred: " + ret.ToString() + " - " + retMsg)
     Return False
   End If
End If

Return True
End Function

Alternative Managed API:

System.Diagnostics.Process

Documentation

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