Manual de como bloquear CTRL+ALT+SUP, ALT+TAB, Y OTROS con Visual Basic en WinXP

Iniciado por ANTRAX, Julio 26, 2010, 11:11:14 AM

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CTRL+ALT+SUP (TaskManager)

Se debe ingresar la instrucción "DisableTaskMgr" directamente en el regedit con el valor "1" en la carpeta abajo indicada, esto es fácil hacerlo desde VB.

[HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Policies\System]

Value Name: DisableTaskMgr

Data Type: REG_DWORD (DWORD Value)

Value Data: (0 = default, 1 = bloquea Task Manager)

------------------------------------------------------------------

ALT+TAB, CTRL+ESC (Tecla Windows), ALT+F4

Crear el siguiente Módulo (.BAS), no importa como le llamen

Código: vb
 Option Explicit

Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Public Declare Function GetKeyState Lib "user32" (ByVal nVirtKey As Long) As Integer
Public Declare Function SetWindowsHookEx Lib "user32" Alias "SetWindowsHookExA" (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
Public Declare Function CallNextHookEx Lib "user32" (ByVal hHook As Long, ByVal nCode As Long, ByVal wParam As Long, lParam As Any) As Long
Public Declare Function UnhookWindowsHookEx Lib "user32" (ByVal hHook As Long) As Long

Public Const HC_ACTION = 0
Public Const WM_KEYDOWN = &H100
Public Const WM_KEYUP = &H101
Public Const WM_SYSKEYDOWN = &H104
Public Const WM_SYSKEYUP = &H105
Public Const WH_KEYBOARD_LL = 13

Public Type KBDLLHOOKSTRUCT
     vkCode As Long
     scanCode As Long
     flags As Long
     time As Long
     dwExtraInfo As Long
End Type

Public Enum VirtualKey
   VK_LBUTTON = &H1
   VK_RBUTTON = &H2
   VK_CTRLBREAK = &H3
   VK_MBUTTON = &H4
   VK_BACKSPACE = &H8
   VK_TAB = &H9
   VK_ENTER = &HD
   VK_SHIFT = &H10
   VK_CONTROL = &H11
   VK_ALT = &H12
   VK_PAUSE = &H13
   VK_CAPSLOCK = &H14
   VK_ESCAPE = &H1B
   VK_SPACE = &H20
   VK_PAGEUP = &H21
   VK_PAGEDOWN = &H22
   VK_END = &H23
   VK_HOME = &H24
   VK_LEFT = &H25
   VK_UP = &H26
   VK_RIGHT = &H27
   VK_DOWN = &H28
   VK_PRINTSCREEN = &H2C
   VK_INSERT = &H2D
   VK_DELETE = &H2E
   VK_0 = &H30
   VK_1 = &H31
   VK_2 = &H32
   VK_3 = &H33
   VK_4 = &H34
   VK_5 = &H35
   VK_6 = &H36
   VK_7 = &H37
   VK_8 = &H38
   VK_9 = &H39
   VK_A = &H41
   VK_B = &H42
   VK_C = &H43
   VK_D = &H44
   VK_E = &H45
   VK_F = &H46
   VK_G = &H47
   VK_H = &H48
   VK_I = &H49
   VK_J = &H4A
   VK_K = &H4B
   VK_L = &H4C
   VK_M = &H4D
   vk_n = &H4E
   VK_O = &H4F
   VK_P = &H50
   VK_Q = &H51
   VK_R = &H52
   VK_S = &H53
   VK_T = &H54
   VK_U = &H55
   VK_V = &H56
   VK_W = &H57
   VK_X = &H58
   VK_Y = &H59
   VK_Z = &H5A
   VK_LWINDOWS = &H5B
   VK_RWINDOWS = &H5C
   VK_APPSPOPUP = &H5D
   VK_NUMPAD_0 = &H60
   VK_NUMPAD_1 = &H61
   VK_NUMPAD_2 = &H62
   VK_NUMPAD_3 = &H63
   VK_NUMPAD_4 = &H64
   VK_NUMPAD_5 = &H65
   VK_NUMPAD_6 = &H66
   VK_NUMPAD_7 = &H67
   VK_NUMPAD_8 = &H68
   VK_NUMPAD_9 = &H69
   VK_NUMPAD_MULTIPLY = &H6A
   VK_NUMPAD_ADD = &H6B
   VK_NUMPAD_PLUS = &H6B
   VK_NUMPAD_SUBTRACT = &H6D
   VK_NUMPAD_MINUS = &H6D
   VK_NUMPAD_MOINS = &H6D
   VK_NUMPAD_DECIMAL = &H6E
   VK_NUMPAD_POINT = &H6E
   VK_NUMPAD_DIVIDE = &H6F
   VK_F1 = &H70
   VK_F2 = &H71
   VK_F3 = &H72
   VK_F4 = &H73
   VK_F5 = &H74
   VK_F6 = &H75
   VK_F7 = &H76
   VK_F8 = &H77
   VK_F9 = &H78
   VK_F10 = &H79
   VK_F11 = &H7A
   VK_F12 = &H7B
   VK_NUMLOCK = &H90
   VK_SCROLL = &H91
   VK_LSHIFT = &HA0
   VK_RSHIFT = &HA1
   VK_LCONTROL = &HA2
   VK_RCONTROL = &HA3
   VK_LALT = &HA4
   VK_RALT = &HA5
   VK_POINTVIRGULE = &HBA
   VK_ADD = &HBB
   VK_PLUS = &HBB
   VK_EQUAL = &HBB
   VK_VIRGULE = &HBC
   VK_SUBTRACT = &HBD
   VK_MINUS = &HBD
   VK_MOINS = &HBD
   VK_UNDERLINE = &HBD
   VK_POINT = &HBE
   VK_SLASH = &HBF
   VK_TILDE = &HC0
   VK_LEFTBRACKET = &HDB
   VK_BACKSLASH = &HDC
   VK_RIGHTBRACKET = &HDD
   VK_QUOTE = &HDE
   VK_APOSTROPHE = &HDE
End Enum

Dim p As KBDLLHOOKSTRUCT

Public Function LowLevelKeyboardProc(ByVal nCode As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
   Dim fEatKeystroke As Boolean
   If (nCode = HC_ACTION) Then
     If wParam = WM_KEYDOWN Or wParam = WM_SYSKEYDOWN Or wParam = WM_KEYUP Or wParam = WM_SYSKEYUP Then
       CopyMemory p, ByVal lParam, Len(p)
       fEatKeystroke = _
         (p.vkCode = VK_CAPSLOCK) Or _
         (p.vkCode = VK_LWINDOWS) Or _
         (p.vkCode = VK_RWINDOWS) Or _
         (p.vkCode = VK_APPSPOPUP) Or _
         ((p.vkCode = VK_SPACE) And ((GetKeyState(VK_ALT) And &H8000) <> 0)) Or _
         ((p.vkCode = VK_TAB) And ((GetKeyState(VK_ALT) And &H8000) <> 0)) Or _
         ((p.vkCode = VK_ESCAPE) And ((GetKeyState(VK_CONTROL) And &H8000) <> 0))
     End If
   End If
   If fEatKeystroke Then
     LowLevelKeyboardProc = -1
   Else
     LowLevelKeyboardProc = CallNextHookEx(0, nCode, wParam, ByVal lParam)
   End If
End Function


Es mucho texto, sugiero Copiar y Pegar.

Para bloquear en cualquier momento se debe escribir la sigueinte setencia:

Código: vb
 hhkLowLevelKybd = SetWindowsHookEx(WH_KEYBOARD_LL, AddressOf LowLevelKeyboardProc, App.hInstance, 0)


Para desbloquear (ojo, esto es importantísimo, si no hay que resetear la máquina), se digita la siguiente sentencia:

Código: vb
 UnhookWindowsHookEx hhkLowLevelKybd


Para bloquear y ocultar la barra de tareas (TaskBar)

En otro módulo (.BAS) digitar:

Código: vb
 Global Const SW_HIDE = 0
Global Const SW_SHOWNORMAL = 1
Global Const SW_SHOW = 5

Public Declare Function FindWindowHandle Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Public Declare Function ShowWindow Lib "user32" (ByVal hWnd As Long, ByVal nCmdShow As Long) As Long


Para que se ejecute las funciones escribir las siguientes sentencias:

Código: vb
   Dim hWnd As Long
   Dim Res As Long
   hWnd = FindWindowHandle("shell_traywnd", Chr(0))
   Res = ShowWindow(hWnd, SW_HIDE)


Y para desbloquear y mostrar de nuevo:

Código: vb
   hWnd = FindWindowHandle("shell_traywnd", Chr(0))
   Res = ShowWindow(hWnd, SW_SHOW)


Por último para minimizar todas las ventanas incluso si están en modo gráfico como juegos,

En un módulo (.BAS) digitar lo siguiente:

Código: vb
 Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, _
ByVal dwFlags As Long, ByVal dwExtraInfo As Long)

Public Const VK_LWIN = &H5B
Public Const KEYEVENTF_KEYUP = &H2


Para que se ejecute el proceso dar las siguientes instrucciones:

Código: vb
   Call keybd_event(VK_LWIN, 0, 0, 0)
   Call keybd_event(&H4D, 0, 0, 0)
   Call keybd_event(VK_LWIN, 0, KEYEVENTF_KEYUP, 0)