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Imports System.Runtime.InteropServices

                    // is run in the background with no access to the console

/// <returns>If the function succeeds, the function returns <c>true</c>. If the function fails, it returns <c>false</c>. For extended error data, call <see cref="System.Runtime.InteropServices.Marshal.GetLastWin32Error"/>.</returns>

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Never gonna run around and desert you

    using System.Runtime.InteropServices;

Never gonna run around and desert you

[System.Runtime.InteropServices.DllImport("Wininet.dll")]

using System.Runtime.InteropServices;

    <System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.Bool)> Boolean

    <System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.Bool)> Boolean

    'sBuffer = System.Runtime.InteropServices.Marshal.AllocHGlobal(dwBufferLength)

        MsgBox("1st Party: There was an error: Code " & CStr(System.Runtime.InteropServices.Marshal.GetLastWin32Error()))

        MsgBox("There was an error: Code " & CStr(System.Runtime.InteropServices.Marshal.GetLastWin32Error()))

   NOTRUNCATE = 0x00000020,

   REMAPRUNDLL = 0x00000080,

   qa.GetString(ASSOCF.NOTRUNCATE, ASSOCSTR.COMMAND,

   qa.GetString(ASSOCF.NOTRUNCATE, ASSOCSTR.COMMAND,

    NoTruncate = 0x20,

    RemapRunDll = 0x80,

  using System.Runtime.InteropServices;

  using System.Runtime.InteropServices;

Never gonna run around and desert you

[System.Runtime.InteropServices.ComImport]

     /// The program is running on one of the following versions of Windows:

     /// The program is running on Windows 2000 or one of its successors.

     /// The program is running on Windows 2000 Terminal Server in either Remote

     /// The program is running on Windows Embedded, any version. Equivalent to

     /// The program is running as a Terminal Server client. Equivalent to

     /// The program is running on Windows 2000 Terminal Server in the Remote

     /// The program is running on Windows NT Workstation or Windows 2000 (or one of

     /// The program is running on Windows Datacenter Server or Windows Server

     /// The program is running on Windows Advanced Server or Windows Server

     /// The program is running on Windows Server (Standard) or Windows Server

     /// The program is running on Windows 2000 Terminal Server in Application

     /// The program is running on Windows XP (or one of its successors), Home

     /// The program is running on any Windows Server product. Equivalent to

     /// The program is a 32-bit program running on 64-bit Windows.

     /// The program is running on Microsoft Small Business Server with restrictive

     /// The program is running on Windows XP Tablet PC Edition, or one of its

     /// The program is running on Windows XP Media Center Edition, or one of its

     /// The program is running on Windows Appliance Server.

''' Truncates a path to fit within a certain number of characters by replacing path components with ellipses.

using System.Runtime.InteropServices;

''' Truncates a path to fit within a certain number of characters by replacing path components with ellipses.

using System.Runtime.InteropServices;

Dim strUnExpandEnvStrings As String

If blnOK = True Then strUnExpandEnvStrings = sb.ToString ' Should be %ProgramFiles%\Test on English OS

static extern void SHCreateStreamOnFileEx(string fileName, uint grfmode, uint dwAttributes, bool fCreate, System.Runtime.InteropServices.ComTypes.IStream streamNull, ref System.Runtime.InteropServices.ComTypes.IStream stream);

static extern void SHCreateStreamOnFileEx(string fileName, uint grfmode, uint dwAttributes, bool fCreate, System.Runtime.InteropServices.ComTypes.IStream streamNull, ref System.Runtime.InteropServices.ComTypes.IStream stream);

<System.Runtime.InteropServices.DllImport("shlwapi", CharSet:=System.Runtime.InteropServices.CharSet.Auto)> _

Never gonna run around and desert you

        MSIINSTALLCONTEXT_USERUNMANAGED =   2,

        MSIINSTALLCONTEXT_ALL       = (MSIINSTALLCONTEXT_USERMANAGED | MSIINSTALLCONTEXT_USERUNMANAGED | MSIINSTALLCONTEXT_MACHINE),

        MSIINSTALLCONTEXT_USERUNMANAGED =   2,

        MSIINSTALLCONTEXT_ALL       = (MSIINSTALLCONTEXT_USERMANAGED | MSIINSTALLCONTEXT_USERUNMANAGED | MSIINSTALLCONTEXT_MACHINE),    

        uint res = MsiInterop.MsiEnumProductsEx(codeToFind, null, (uint)MsiInterop.MSIINSTALLCONTEXT.MSIINSTALLCONTEXT_USERUNMANAGED, 0, code, out junk, szSid, ref pccSid);

        MSIINSTALLCONTEXT_USERUNMANAGED =   2,

        MSIINSTALLCONTEXT_ALL       = (MSIINSTALLCONTEXT_USERMANAGED | MSIINSTALLCONTEXT_USERUNMANAGED | MSIINSTALLCONTEXT_MACHINE),    

You can use this to query product codes from a Windows Service running under the local system account.

        uint res = MsiInterop.MsiEnumProductsEx(codeToFind, null, (uint)MsiInterop.MSIINSTALLCONTEXT.MSIINSTALLCONTEXT_USERUNMANAGED, 0, code, out junk, szSid, ref pccSid);

     case 1605:  return Resources.MsiErrorUnknownProduct ;

     case 1608:  return Resources.MsiErrorUnknownProperty ;

     case 1647:  return Resources.MsiErrorUnknownPatch ;

      return Resources.AgentErrorUnknown;

     case 1605:  return Resources.MsiErrorUnknownProduct ;

     case 1608:  return Resources.MsiErrorUnknownProperty ;

     case 1647:  return Resources.MsiErrorUnknownPatch ;

      return Resources.AgentErrorUnknown;

      UserUnmanaged=2,

using System.Runtime.InteropServices;

The sample application below demonstrates how to use MsiRecordSetString, MsiOpenDatabase, MsiCreateRecord, MsiCloseHandle, MsiDatabaseOpenView, MsiViewExecute, MsiDatabaseCommit, and MsiViewClose in C# to modify a property value in an MSI database. To run it, simply create a new Windows Console application and replace the code that Visual Studio gives you with the code below. You may have to modify the namespace name. The sample as-is requires a valid MSI database named SETUP.msi, with a property named PROPERTY1 in the Property table, to be located in C:\. You can of course change the path to your MSI database in the calls to ChangeMSIProperty() in Main() and use any existing property you wish.

using System.Runtime.InteropServices;

     DS_DOMAIN_NATIVE_MODE     = 0x0010,  // Primary domain is running in native mode

     DS_DOMAIN_NATIVE_MODE     = 0x0010,  // Primary domain is running in native mode

    /// <summary>The directory service is running on this computer.</summary>

    ServerRunning = 1,

    /// <summary>The directory service is running in mixed mode.</summary>

    /// <summary>The directory service is running as read-only on this computer.</summary>

    /// <summary>Primary domain server is running.</summary>

    Running = 1,

Declare Function NetDfsAdd Lib "NETAPI32.DLL" (<Runtime.InteropServices.MarshalAs(Runtime.InteropServices.UnmanagedType.LPWStr)> ByVal DfsEntryPath As String, <Runtime.InteropServices.MarshalAs(Runtime.InteropServices.UnmanagedType.LPWStr)> ByVal ServerName As String, <Runtime.InteropServices.MarshalAs(Runtime.InteropServices.UnmanagedType.LPWStr)> ByVal ShareName As String, <Runtime.InteropServices.MarshalAs(Runtime.InteropServices.UnmanagedType.LPWStr)> ByVal Comment As String, ByVal Flags As Uint32) As Long

    Declare Function NetDfsRemove Lib "NETAPI32.DLL" (<Runtime.InteropServices.MarshalAs(Runtime.InteropServices.UnmanagedType.LPWStr)> _

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

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

Imports System.Runtime.InteropServices

    using System.Runtime.InteropServices;

    ''' <remarks>If you call this function on a domain controller that is running Active Directory, access is allowed or denied based on

The Alerter service must be running for NetMessageBufferSend to function.

using System.Runtime.InteropServices;

using System.Runtime.InteropServices;

using System.Runtime.InteropServices;

    /// Time the job is run. Expressed in milliseconds from midnight of the day the

    /// job is to be run.

    /// Bitmask of days of the month that the job is to be run.

    /// Bitmask is from the first to thirty first, lowest to highest bit, or 0 if the job will be run only once.

    /// Bitmask of days of the week that the job is to be run.

    /// Bitmask is from Monday to Sunday, from lowest to highest bit, or 0 if the job will be run only once.

    /// The command to run.

    JOB_RUN_PERIODICALLY = 1,

    JOB_RUNS_TODAY = 4,

using System.Runtime.InteropServices;

            [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]

            [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]

            [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]

namespace System.Runtime.InteropServices

using System.Runtime.InteropServices;

            [MarshalAs(System.Runtime.InteropServices.UnmanagedType.U4)]

            [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]

            [MarshalAs(System.Runtime.InteropServices.UnmanagedType.U4)] public UInt32 sv101_version_major;

            [MarshalAs(System.Runtime.InteropServices.UnmanagedType.U4)] public UInt32 sv101_version_minor;

            [MarshalAs(System.Runtime.InteropServices.UnmanagedType.U4)] public UInt32 sv101_type;

            [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)] public string sv101_comment;

    [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]

Imports System.Runtime.InteropServices

  Imports System.Runtime.InteropServices

int Result = NetShareGetInfo("ArunGanesh", "public",502,out pBuffer);

    using System.Runtime.InteropServices;

using System.Runtime.InteropServices;

Imports System.Runtime.InteropServices

Imports System.Runtime.InteropServices.UnmanagedType

Imports System.Runtime.InteropServices.Marshal

Imports System.Runtime.InteropServices.StructLayoutAttribute

        using System.Runtime.InteropServices;

        using System.Runtime.InteropServices;

using System.Runtime.InteropServices;

using System.Runtime.InteropServices;

using System.Runtime.InteropServices;

Shared Function NetWkstaUserEnum(ByVal servername As String, ByVal level As Integer, <System.Runtime.InteropServices.Out()> ByRef bufptr As IntPtr, ByVal prefmaxlen As Integer, <System.Runtime.InteropServices.Out()> ByRef entriesread As Integer, <System.Runtime.InteropServices.Out()> ByRef totalentries As Integer, ByRef resume_handle As Integer) As Integer

If you want to find the user logged in to the workstation, consider instead a WMI query ("select UserName from Win32_ComputerSystem"), which has certain advantages (runs faster, less ambigious results, doesn't require Interop if using .Net 2.0 System.Management namespace, etc.)

    [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]

    [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]

    [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]

    [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]

    return System.Runtime.Interop.Marshal.PtrToStringAnsi( res );

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto, Pack:=1), System.Runtime.InteropServices.ComVisible(False)> _

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto, Pack:=1), System.Runtime.InteropServices.ComVisible(False)> _

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto, Pack:=1), System.Runtime.InteropServices.ComVisible(False)> _

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto, Pack:=1), System.Runtime.InteropServices.ComVisible(False)> _

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto, Pack:=1), System.Runtime.InteropServices.ComVisible(False)> _

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto, Pack:=1), System.Runtime.InteropServices.ComVisible(False)> _

FILETIME, which is defined in [System.Runtime.InteropServices] or [System.Runtime.InteropServices.ComTypes] in the .NET Framework 2.0.

FILETIME, which is defined in [System.Runtime.InteropServices] or [System.Runtime.InteropServices.ComTypes] in the .NET Framework 2.0.