关于键盘屏蔽（网上的资料+自己的一些疑问）
这几天一直在研究用钩子实现键盘屏蔽的方法，查了好多，实验了好多，终于成功了，现在拿出来和广大小菜分享一下
（三断笛版主说的那个贴我没找到
）本人也是小菜
，还有好多地方不明白，希望有人解答一下好了，下面看代码
Option Explicit
'一些用到的API和常量
Private 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 UnhookWindowsHookEx Lib "User32" (ByVal hHook 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 Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (lpvDest As Any, ByVal lpvSource As Long, ByVal cbCopy As Long)
Public Type KEYMSGS
vKey As Long
sKey As Long
flag As Long
time As Long
End Type
Public Const WH_KEYBOARD_LL = 13
Public Const VK_LWIN = &H5B ’依照这一行，在下面加入你想屏蔽的键的虚拟键码，比如TAB键的虚拟键码就是&H9
Public Const VK_RWIN = &H5C
Public Const VK_TAB = &H9
Public Const VK_F6 = &H75
Public Const HC_ACTION = 0 ’这下面的不知道是干什么的
Public Const HC_SYSMODALOFF = 5
Public Const HC_SYSMODALON = 4
Public Const WM_KEYDOWN = &H100 '好像虚拟键码里没&H100 &H101 &H104 &H105这些键值，为什么这样写
Public Const WM_KEYUP = &H101
Public Const WM_SYSKEYDOWN = &H104
Public Const WM_SYSKEYUP = &H105
Public P As KEYMSGS
Public lHook As Long
Public Function LowLevelKeyboardProc(ByVal nCode As Long, ByVal wParam As Long, ByVal lParam As Long) As Long ’这里面的wParam和lParam是干毛的啊，传递了什么
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)
Select Case P.vKey
Case VK_LWIN, VK_RWIN '屏蔽win
fEatKeystroke = True
Case 164, 165 '屏蔽alt
fEatKeystroke = True
Case VK_TAB '屏蔽TAB
fEatKeystroke = True
Case VK_F6 '屏蔽F6
fEatKeystroke = True
End Select
End If
End If
If fEatKeystroke Then
LowLevelKeyboardProc = -1
Else
LowLevelKeyboardProc = CallNextHookEx(0, nCode, wParam, ByVal lParam)
End If
End Function
Private Sub cmdOK_Click()
lHook = SetWindowsHookEx(WH_KEYBOARD_LL, AddressOf LowLevelKeyboardProc, App.hInstance, 0) '设置键盘勾子
End Sub
Private Sub cmdOut_Click()
UnhookWindowsHookEx lHook '取消键盘勾子
End Sub
好像就这些了，应该写全了，小菜们按照说明复制再改改就行了，不全的话高手补充哦
还有就是虚拟键码，这个我一开始也不懂，下面写出来常用的大家瞧瞧
Public Const VK_LBUTTON = &H1
Public Const VK_RBUTTON = &H2
Public Const VK_CANCEL = &H3
Public Const VK_MBUTTON = &H4
Public Const VK_BACK = &H8
Public Const VK_TAB = &H9
Public Const VK_CLEAR = &HC
Public Const VK_RETURN = &HD
Public Const VK_SHIFT = &H10
Public Const VK_CONTROL = &H11
Public Const VK_MENU = &H12
Public Const VK_PAUSE = &H13
Public Const VK_CAPITAL = &H14
Public Const VK_ESCAPE = &H1B
Public Const VK_SPACE = &H20
Public Const VK_PRIOR = &H21
Public Const VK_NEXT = &H22
Public Const VK_END = &H23
Public Const VK_HOME = &H24
Public Const VK_LEFT = &H25
Public Const VK_UP = &H26
Public Const VK_RIGHT = &H27
Public Const VK_DOWN = &H28
Public Const VK_Select = &H29
Public Const VK_PRINT = &H2A
Public Const VK_EXECUTE = &H2B
Public Const VK_SNAPSHOT = &H2C
Public Const VK_Insert = &H2D
Public Const VK_Delete = &H2E
Public Const VK_HELP = &H2F
Public Const VK_0 = &H30
Public Const VK_1 = &H31
Public Const VK_2 = &H32
Public Const VK_3 = &H33
Public Const VK_4 = &H34
Public Const VK_5 = &H35
Public Const VK_6 = &H36
Public Const VK_7 = &H37
Public Const VK_8 = &H38
Public Const VK_9 = &H39
Public Const VK_A = &H41
Public Const VK_B = &H42
Public Const VK_C = &H43
Public Const VK_D = &H44
Public Const VK_E = &H45
Public Const VK_F = &H46
Public Const VK_G = &H47
Public Const VK_H = &H48
Public Const VK_I = &H49
Public Const VK_J = &H4A
Public Const VK_K = &H4B
Public Const VK_L = &H4C
Public Const VK_M = &H4D
Public Const VK_N = &H4E
Public Const VK_O = &H4F
Public Const VK_P = &H50
Public Const VK_Q = &H51
Public Const VK_R = &H52
Public Const VK_S = &H53
Public Const VK_T = &H54
Public Const VK_U = &H55
Public Const VK_V = &H56
Public Const VK_W = &H57
Public Const VK_X = &H58
Public Const VK_Y = &H59
Public Const VK_Z = &H5A
Public Const VK_STARTKEY = &H5B
Public Const VK_CONTEXTKEY = &H5D
Public Const VK_NUMPAD0 = &H60
Public Const VK_NUMPAD1 = &H61
Public Const VK_NUMPAD2 = &H62
Public Const VK_NUMPAD3 = &H63
Public Const VK_NUMPAD4 = &H64
Public Const VK_NUMPAD5 = &H65
Public Const VK_NUMPAD6 = &H66
Public Const VK_NUMPAD7 = &H67
Public Const VK_NUMPAD8 = &H68
Public Const VK_NUMPAD9 = &H69
Public Const VK_MULTIPLY = &H6A
Public Const VK_ADD = &H6B
Public Const VK_SEPARATOR = &H6C
Public Const VK_SUBTRACT = &H6D
Public Const VK_DECIMAL = &H6E
Public Const VK_DIVIDE = &H6F
Public Const VK_F1 = &H70
Public Const VK_F2 = &H71
Public Const VK_F3 = &H72
Public Const VK_F4 = &H73
Public Const VK_F5 = &H74
Public Const VK_F6 = &H75
Public Const VK_F7 = &H76
Public Const VK_F8 = &H77
Public Const VK_F9 = &H78
Public Const VK_F10 = &H79
Public Const VK_F11 = &H7A
Public Const VK_F12 = &H7B
Public Const VK_F13 = &H7C
Public Const VK_F14 = &H7D
Public Const VK_F15 = &H7E
Public Const VK_F16 = &H7F
Public Const VK_F17 = &H80
Public Const VK_F18 = &H81
Public Const VK_F19 = &H82
Public Const VK_F20 = &H83
Public Const VK_F21 = &H84
Public Const VK_F22 = &H85
Public Const VK_F23 = &H86
Public Const VK_F24 = &H87
Public Const VK_NUMLOCK = &H90
Public Const VK_OEM_SCROLL = &H91
Public Const VK_OEM_1 = &HBA
Public Const VK_OEM_PLUS = &HBB
Public Const VK_OEM_COMMA = &HBC
Public Const VK_OEM_MINUS = &HBD
Public Const VK_OEM_PERIOD = &HBE
Public Const VK_OEM_2 = &HBF
Public Const VK_OEM_3 = &HC0
Public Const VK_OEM_4 = &HDB
Public Const VK_OEM_5 = &HDC
Public Const VK_OEM_6 = &HDD
Public Const VK_OEM_7 = &HDE
Public Const VK_OEM_8 = &HDF
Public Const VK_ICO_F17 = &HE0
Public Const VK_ICO_F18 = &HE1
Public Const VK_OEM102 = &HE2
Public Const VK_ICO_HELP = &HE3
Public Const VK_ICO_00 = &HE4
Public Const VK_ICO_CLEAR = &HE6
Public Const VK_OEM_RESET = &HE9
Public Const VK_OEM_JUMP = &HEA
Public Const VK_OEM_PA1 = &HEB
Public Const VK_OEM_PA2 = &HEC
Public Const VK_OEM_PA3 = &HED
Public Const VK_OEM_WSCTRL = &HEE
Public Const VK_OEM_CUSEL = &HEF
Public Const VK_OEM_ATTN = &HF0
Public Const VK_OEM_FINNISH = &HF1
Public Const VK_OEM_COPY = &HF2
Public Const VK_OEM_AUTO = &HF3
Public Const VK_OEM_ENLW = &HF4
Public Const VK_OEM_BACKTAB = &HF5
Public Const VK_ATTN = &HF6
Public Const VK_CRSEL = &HF7
Public Const VK_EXSEL = &HF8
Public Const VK_EREOF = &HF9
Public Const VK_PLAY = &HFA
Public Const VK_ZOOM = &HFB
Public Const VK_NONAME = &HFC
Public Const VK_PA1 = &HFD
Public Const VK_OEM_CLEAR = &HFE
