"Try this for VB"

Imports System.Runtime.InteropServices

Public Structure PROCESS_INFORMATION

    Public hProcess As Integer
    Public hThread As Integer
    Public dwProcessId As Integer
    Public dwThreadId As Integer

End Structure

    ' Use this version when the API allocates the strings
    ' (For example: GetStartupInfo)

Structure STARTUPINFO

    Public cb As Integer
    Public lpReserved As Integer ' Instead of String!
    Public lpDesktop As Integer  ' Instead of String!
    Public lpTitle As Integer    ' Instead of String!
    Public dwX As Integer
    Public dwY As Integer
    Public dwXSize As Integer
    Public dwYSize As Integer
    Public dwXCountChars As Integer
    Public dwYCountChars As Integer
    Public dwFillAttribute As Integer
    Public dwFlags As Integer
    Public wShowWindow As Short
    Public cbReserved2 As Short
    Public lpReserved2 As Integer
    Public hStdInput As Integer
    Public hStdOutput As Integer
    Public hStdError As Integer

End Structure

Private/Public Function CreateProcessWithLogonW( _

  """<MarshalAs(UnmanagedType.LPWStr)>""" ByVal lpUsername As String, _
  """<MarshalAs(UnmanagedType.LPWStr)>""" ByVal lpDomain As String, _
  """<MarshalAs(UnmanagedType.LPWStr)>""" ByVal lpPassword As String, _
  ByVal dwLogonFlags As Integer, _
  """ByVal lpApplicationName As Integer""", _
  """<MarshalAs(UnmanagedType.LPWStr)>""" ByVal lpCommandLine As String, _
  ByVal dwCreationFlags As Integer, _
  """ByVal lpEnvironment As Integer""", _
  """<MarshalAs(UnmanagedType.LPWStr)>""" ByVal lpCurrentDirectory As String, _
  ByRef lpStartupInfo As STARTUPINFO, _
  ByRef lpProcessInformation As PROCESS_INFORMATION _
  ) As Integer
End Function

"Sample Code"

Private/Public Const LOGON_WITH_PROFILE = &H1

Private/Public/private Const CREATE_DEFAULT_ERROR_MODE = &H4000000

""" Before using this, you will need to change the STARTUPINFO and PROCESS_ INFORMATION STRUCTURE

Private/Public Declare Function CloseHandle Lib "kernel32.dll" (ByVal hObject As Long) As Long

Private/Public Shared Function OpenAppAsUser(<System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)> _

ByVal UserName As String, <System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)> ByVal Password As String, _

<System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)> ByVal DomainName As String, _

<System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)> ByVal ApplicationName As String, <System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)> ByVal CommandLine As String, _

<System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)> ByVal CurrentDirectory As String) As Long

Dim si As STARTUPINFO

Dim pi As PROCESS_INFORMATION

Dim Result As Long

si.cb = Len(si)

Result = CreateProcessWithLogonW(UserName, DomainName, Password, LOGON_WITH_PROFILE, 0%, CommandLine, CREATE_DEFAULT_ERROR_MODE, 0%, CurrentDirectory, si, pi)

    ' CreateProcessWithLogonW() does not

If Result <> 0 Then

    CloseHandle(pi.hThread)
    CloseHandle(pi.hProcess)
    W2KRunAsUser = 0

Else

    W2KRunAsUser = Err.LastDllError
    MsgBox("CreateProcessWithLogonW() failed with error " & Err.LastDllError, vbExclamation)

End If

End Function

VB Signature:

' This Code Does not work in VB.Net

C# Signature:

static extern TODO CreateProcessWithLogonW(TODO);

[DllImport("advapi32.dll")]

<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 LAppname as Integer"

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

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