Ayuda para traducir una función anónima de C# a VBNET

[Eleкtro]

Hola

No puedo hallar la manera de traducir esta línea de código por mi mismo, espero que puedan ayudarme.

El problema es en este For, que se usa la función anónima "MyEnumThreadWindowsProc" como un argumento, sin pasarle argumentos a dicha función, y esto no sé traducirlo a VBNET.

Código (csharp) [Seleccionar] Expandir

foreach (ProcessThread t in p.Threads)
{
 EnumThreadWindows(t.Id, MyEnumThreadWindowsProc, IntPtr.Zero);
}

Los traductores no saben traducirlo corréctamente, y obtengo este reusltado:

Código (vbnet) [Seleccionar] Expandir

For Each t As ProcessThread In p.Threads
 EnumThreadWindows(t.Id, MyEnumThreadWindowsProc, IntPtr.Zero)
Next

Según una persona me ha comentado hace poco, esto podría ser una solución:

Código (vbnet) [Seleccionar] Expandir

  For Each t As ProcessThread In p.Threads
  Dim returnMyEnumThreadWindowsProc As Object
  returnMyEnumThreadWindowsProc = MyEnumThreadWindowsProc ( ... )
  EnumThreadWindows(t.Id, returnMyEnumThreadWindowsProc , IntPtr.Zero)
Next

...Pero aún así sigo con el problema de no saber que parámetros enviarle a "MyEnumThreadWindowsProc " en esa última modificación.



Aquí tienen la class de C#:

Código (csharp) [Seleccionar] Expandir

using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;

namespace TaskbarHide
{
   /// <summary>
   /// Helper class for hiding/showing the taskbar and startmenu on
   /// Windows XP and Vista.
   /// </summary>
   public static class Taskbar
   {
       [DllImport("user32.dll")]
       private static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);
       [DllImport("user32.dll", CharSet = CharSet.Auto)]
       private static extern bool EnumThreadWindows(int threadId, EnumThreadProc pfnEnum, IntPtr lParam);
       [DllImport("user32.dll", SetLastError = true)]
       private static extern System.IntPtr FindWindow(string lpClassName, string lpWindowName);
       [DllImport("user32.dll", SetLastError = true)]
       private static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className,  string windowTitle);
       [DllImport("user32.dll")]
       private static extern IntPtr FindWindowEx(IntPtr parentHwnd, IntPtr childAfterHwnd, IntPtr className, string windowText);
       [DllImport("user32.dll")]
       private static extern int ShowWindow(IntPtr hwnd, int nCmdShow);
       [DllImport("user32.dll")]
       private static extern uint GetWindowThreadProcessId(IntPtr hwnd, out int lpdwProcessId);

       private const int SW_HIDE = 0;
       private const int SW_SHOW = 5;

       private const string VistaStartMenuCaption = "Start";
       private static IntPtr vistaStartMenuWnd = IntPtr.Zero;
       private delegate bool EnumThreadProc(IntPtr hwnd, IntPtr lParam);

       /// <summary>
       /// Show the taskbar.
       /// </summary>
       public static void Show()
       {
           SetVisibility(true);
       }

       /// <summary>
       /// Hide the taskbar.
       /// </summary>
       public static void Hide()
       {
           SetVisibility(false);
       }

       /// <summary>
       /// Sets the visibility of the taskbar.
       /// </summary>
       public static bool Visible
       {
           set { SetVisibility(value); }
       }

       /// <summary>
       /// Hide or show the Windows taskbar and startmenu.
       /// </summary>
       /// <param name="show">true to show, false to hide</param>
       private static void SetVisibility(bool show)
       {
           // get taskbar window
           IntPtr taskBarWnd = FindWindow("Shell_TrayWnd", null);

           // try it the WinXP way first...
           IntPtr startWnd = FindWindowEx(taskBarWnd, IntPtr.Zero, "Button", "Start");

           if (startWnd == IntPtr.Zero)
           {
               // try an alternate way, as mentioned on CodeProject by Earl Waylon Flinn
               startWnd = FindWindowEx(IntPtr.Zero, IntPtr.Zero, (IntPtr)0xC017, "Start");
           }

           if (startWnd == IntPtr.Zero)
           {
               // ok, let's try the Vista easy way...
               startWnd = FindWindow("Button", null);

               if (startWnd == IntPtr.Zero)
               {
                   // no chance, we need to to it the hard way...
                   startWnd = GetVistaStartMenuWnd(taskBarWnd);
               }
           }

           ShowWindow(taskBarWnd, show ? SW_SHOW : SW_HIDE);
           ShowWindow(startWnd, show ? SW_SHOW : SW_HIDE);
       }

       /// <summary>
       /// Returns the window handle of the Vista start menu orb.
       /// </summary>
       /// <param name="taskBarWnd">windo handle of taskbar</param>
       /// <returns>window handle of start menu</returns>
       private static IntPtr GetVistaStartMenuWnd(IntPtr taskBarWnd)
       {
           // get process that owns the taskbar window
           int procId;
           GetWindowThreadProcessId(taskBarWnd, out procId);

           Process p = Process.GetProcessById(procId);
           if (p != null)
           {
               // enumerate all threads of that process...
               foreach (ProcessThread t in p.Threads)
               {
                   EnumThreadWindows(t.Id, MyEnumThreadWindowsProc, IntPtr.Zero);
               }
           }
           return vistaStartMenuWnd;
       }

       /// <summary>
       /// Callback method that is called from 'EnumThreadWindows' in 'GetVistaStartMenuWnd'.
       /// </summary>
       /// <param name="hWnd">window handle</param>
       /// <param name="lParam">parameter</param>
       /// <returns>true to continue enumeration, false to stop it</returns>
       private static bool MyEnumThreadWindowsProc(IntPtr hWnd, IntPtr lParam)
       {
           StringBuilder buffer = new StringBuilder(256);
           if (GetWindowText(hWnd, buffer, buffer.Capacity) > 0)
           {
               Console.WriteLine(buffer);
               if (buffer.ToString() == VistaStartMenuCaption)
               {
                   vistaStartMenuWnd = hWnd;
                   return false;
               }
           }
           return true;
       }
   }
}



Y aquí la class "traducida":

Código (vbnet) [Seleccionar] Expandir

'
' * Copyright (c) 2008..11 by Simon Baer
' *
' *  You may use this code for whatever you want.
'


Imports System
Imports System.Text
Imports System.Runtime.InteropServices
Imports System.Diagnostics

Namespace TaskbarHide
   ''' <summary>
   ''' Helper class for hiding/showing the taskbar and startmenu on
   ''' Windows XP and Vista.
   ''' </summary>
   Public NotInheritable Class Taskbar
       Private Sub New()
       End Sub
       <DllImport("user32.dll")> _
       Private Shared Function GetWindowText(hWnd As IntPtr, text As StringBuilder, count As Integer) As Integer
       End Function
       <DllImport("user32.dll", CharSet := CharSet.Auto)> _
       Private Shared Function EnumThreadWindows(threadId As Integer, pfnEnum As EnumThreadProc, lParam As IntPtr) As Boolean
       End Function
       <DllImport("user32.dll", SetLastError := True)> _
       Private Shared Function FindWindow(lpClassName As String, lpWindowName As String) As System.IntPtr
       End Function
       <DllImport("user32.dll", SetLastError := True)> _
       Private Shared Function FindWindowEx(parentHandle As IntPtr, childAfter As IntPtr, className As String, windowTitle As String) As IntPtr
       End Function
       <DllImport("user32.dll")> _
       Private Shared Function FindWindowEx(parentHwnd As IntPtr, childAfterHwnd As IntPtr, className As IntPtr, windowText As String) As IntPtr
       End Function
       <DllImport("user32.dll")> _
       Private Shared Function ShowWindow(hwnd As IntPtr, nCmdShow As Integer) As Integer
       End Function
       <DllImport("user32.dll")> _
       Private Shared Function GetWindowThreadProcessId(hwnd As IntPtr, lpdwProcessId As Integer) As UInteger
       End Function

       Private Const SW_HIDE As Integer = 0
       Private Const SW_SHOW As Integer = 5

       Private Const VistaStartMenuCaption As String = "Start"
       Private Shared vistaStartMenuWnd As IntPtr = IntPtr.Zero
       Private Delegate Function EnumThreadProc(hwnd As IntPtr, lParam As IntPtr) As Boolean

       ''' <summary>
       ''' Show the taskbar.
       ''' </summary>
       Public Shared Sub Show()
           SetVisibility(True)
       End Sub

       ''' <summary>
       ''' Hide the taskbar.
       ''' </summary>
       Public Shared Sub Hide()
           SetVisibility(False)
       End Sub

       ''' <summary>
       ''' Sets the visibility of the taskbar.
       ''' </summary>
       Public Shared WriteOnly Property Visible() As Boolean
           Set
               SetVisibility(value)
           End Set
       End Property

       ''' <summary>
       ''' Hide or show the Windows taskbar and startmenu.
       ''' </summary>
       ''' <param name="show">true to show, false to hide</param>
       Private Shared Sub SetVisibility(show As Boolean)
           ' get taskbar window
           Dim taskBarWnd As IntPtr = FindWindow("Shell_TrayWnd", Nothing)

           ' try it the WinXP way first...
           Dim startWnd As IntPtr = FindWindowEx(taskBarWnd, IntPtr.Zero, "Button", "Start")

           If startWnd = IntPtr.Zero Then
               ' try an alternate way, as mentioned on CodeProject by Earl Waylon Flinn
               startWnd = FindWindowEx(IntPtr.Zero, IntPtr.Zero, DirectCast(&Hc017, IntPtr), "Start")
           End If

           If startWnd = IntPtr.Zero Then
               ' ok, let's try the Vista easy way...
               startWnd = FindWindow("Button", Nothing)

               If startWnd = IntPtr.Zero Then
                   ' no chance, we need to to it the hard way...
                   startWnd = GetVistaStartMenuWnd(taskBarWnd)
               End If
           End If

           ShowWindow(taskBarWnd, If(show, SW_SHOW, SW_HIDE))
           ShowWindow(startWnd, If(show, SW_SHOW, SW_HIDE))
       End Sub

       ''' <summary>
       ''' Returns the window handle of the Vista start menu orb.
       ''' </summary>
       ''' <param name="taskBarWnd">windo handle of taskbar</param>
       ''' <returns>window handle of start menu</returns>
       Private Shared Function GetVistaStartMenuWnd(taskBarWnd As IntPtr) As IntPtr
           ' get process that owns the taskbar window
           Dim procId As Integer
           GetWindowThreadProcessId(taskBarWnd, procId)

           Dim p As Process = Process.GetProcessById(procId)
           If p IsNot Nothing Then
               ' enumerate all threads of that process...
               For Each t As ProcessThread In p.Threads
                   EnumThreadWindows(t.Id, MyEnumThreadWindowsProc, IntPtr.Zero)
               Next
           End If
           Return vistaStartMenuWnd
       End Function

       ''' <summary>
       ''' Callback method that is called from 'EnumThreadWindows' in 'GetVistaStartMenuWnd'.
       ''' </summary>
       ''' <param name="hWnd">window handle</param>
       ''' <param name="lParam">parameter</param>
       ''' <returns>true to continue enumeration, false to stop it</returns>
       Private Shared Function MyEnumThreadWindowsProc(hWnd As IntPtr, lParam As IntPtr) As Boolean
           Dim buffer As New StringBuilder(256)
           If GetWindowText(hWnd, buffer, buffer.Capacity) > 0 Then
               Console.WriteLine(buffer)
               If buffer.ToString() = VistaStartMenuCaption Then
                   vistaStartMenuWnd = hWnd
                   Return False
               End If
           End If
           Return True
       End Function
   End Class
End Namespace

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik, @toddanglin
'Facebook: facebook.com/telerik
'=======================================================

[Eleкtro]

Bueno, aquí les dejo el código convertido a vbnet, ya lo conseguí:

Código (vbnet) [Seleccionar] Expandir

Imports System
Imports System.Text
Imports System.Runtime.InteropServices
Imports System.Diagnostics

Namespace TaskbarHide
    ''' <summary>
    ''' Helper class for hiding/showing the taskbar and startmenu on
    ''' Windows XP and Vista.
    ''' </summary>
    Public NotInheritable Class Taskbar
        Private Sub New()
        End Sub
        <DllImport("user32.dll")> _
        Private Shared Function GetWindowText(hWnd As IntPtr, text As StringBuilder, count As Integer) As Integer
        End Function
        <DllImport("user32.dll", CharSet:=CharSet.Auto)> _
        Private Shared Function EnumThreadWindows(threadId As Integer, pfnEnum As EnumThreadProc, lParam As IntPtr) As Boolean
        End Function
        <DllImport("user32.dll", SetLastError:=True)> _
        Private Shared Function FindWindow(lpClassName As String, lpWindowName As String) As System.IntPtr
        End Function
        <DllImport("user32.dll", SetLastError:=True)> _
        Private Shared Function FindWindowEx(parentHandle As IntPtr, childAfter As IntPtr, className As String, windowTitle As String) As IntPtr
        End Function
        <DllImport("user32.dll")> _
        Private Shared Function FindWindowEx(parentHwnd As IntPtr, childAfterHwnd As IntPtr, className As IntPtr, windowText As String) As IntPtr
        End Function
        <DllImport("user32.dll")> _
        Private Shared Function ShowWindow(hwnd As IntPtr, nCmdShow As Integer) As Integer
        End Function
        <DllImport("user32.dll")> _
        Private Shared Function GetWindowThreadProcessId(hwnd As IntPtr, lpdwProcessId As Integer) As UInteger
        End Function

        Private Const SW_HIDE As Integer = 0
        Private Const SW_SHOW As Integer = 5

        Private Const VistaStartMenuCaption As String = "Start"
        Private Shared vistaStartMenuWnd As IntPtr = IntPtr.Zero
        Private Delegate Function EnumThreadProc(hwnd As IntPtr, lParam As IntPtr) As Boolean

        ''' <summary>
        ''' Show the taskbar.
        ''' </summary>
        Public Shared Sub Show()
            SetVisibility(True)
        End Sub

        ''' <summary>
        ''' Hide the taskbar.
        ''' </summary>
        Public Shared Sub Hide()
            SetVisibility(False)
        End Sub

        ''' <summary>
        ''' Sets the visibility of the taskbar.
        ''' </summary>
        Public Shared WriteOnly Property Visible() As Boolean
            Set(value As Boolean)
                SetVisibility(value)
            End Set
        End Property

        ''' <summary>
        ''' Hide or show the Windows taskbar and startmenu.
        ''' </summary>
        ''' <param name="show">true to show, false to hide</param>
        Private Shared Sub SetVisibility(show As Boolean)
            ' get taskbar window
            Dim taskBarWnd As IntPtr = FindWindow("Shell_TrayWnd", Nothing)

            ' try it the WinXP way first...
            Dim startWnd As IntPtr = FindWindowEx(taskBarWnd, IntPtr.Zero, "Button", "Start")

            If startWnd = IntPtr.Zero Then
                ' try an alternate way, as mentioned on CodeProject by Earl Waylon Flinn
                startWnd = FindWindowEx(IntPtr.Zero, IntPtr.Zero, CType(&HC017, IntPtr), "Start")
            End If

            If startWnd = IntPtr.Zero Then
                ' ok, let's try the Vista easy way...
                startWnd = FindWindow("Button", Nothing)

                If startWnd = IntPtr.Zero Then
                    ' no chance, we need to to it the hard way...
                    startWnd = GetVistaStartMenuWnd(taskBarWnd)
                End If
            End If

            ShowWindow(taskBarWnd, If(show, SW_SHOW, SW_HIDE))
            ShowWindow(startWnd, If(show, SW_SHOW, SW_HIDE))
        End Sub

        ''' <summary>
        ''' Returns the window handle of the Vista start menu orb.
        ''' </summary>
        ''' <param name="taskBarWnd">windo handle of taskbar</param>
        ''' <returns>window handle of start menu</returns>
        Private Shared Function GetVistaStartMenuWnd(taskBarWnd As IntPtr) As IntPtr
            ' get process that owns the taskbar window
            Dim procId As Integer
            GetWindowThreadProcessId(taskBarWnd, procId)

            Dim p As Process = Process.GetProcessById(procId)
            If p IsNot Nothing Then
                ' enumerate all threads of that process...
                For Each t As ProcessThread In p.Threads
                    EnumThreadWindows(t.Id, AddressOf MyEnumThreadWindowsProc, IntPtr.Zero)
                Next
            End If
            Return vistaStartMenuWnd
        End Function

        ''' <summary>
        ''' Callback method that is called from 'EnumThreadWindows' in 'GetVistaStartMenuWnd'.
        ''' </summary>
        ''' <param name="hWnd">window handle</param>
        ''' <param name="lParam">parameter</param>
        ''' <returns>true to continue enumeration, false to stop it</returns>
        Private Shared Function MyEnumThreadWindowsProc(hWnd As IntPtr, lParam As IntPtr) As Boolean
            Dim buffer As New StringBuilder(256)
            If GetWindowText(hWnd, buffer, buffer.Capacity) > 0 Then
                Console.WriteLine(buffer)
                If buffer.ToString() = VistaStartMenuCaption Then
                    vistaStartMenuWnd = hWnd
                    Return False
                End If
            End If
            Return True
        End Function
    End Class
End Namespace