Win2K/NT/XP环境下禁用 LWIN,RWIN,WIN+Any,Ctrl+Esc,Alt+Esc,Alt+TAB 等热键(Ctrl+Alt+Delete无法禁用) 'in a form Option Explicit
Dim hhkLowLevelKybd As Long
Private Sub chkDisable_Click() If chkDisable = vbChecked Then hhkLowLevelKybd = SetWindowsHookEx(WH_KEYBOARD_LL, AddressOf LowLevelKeyboardProc, App.hInstance, 0) Else UnhookWindowsHookEx hhkLowLevelKybd hhkLowLevelKybd = 0 End If End Sub
Private Sub Form_Unload(Cancel As Integer) If hhkLowLevelKybd <> 0 Then UnhookWindowsHookEx hhkLowLevelKybd End Sub
'in a module 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 VK_TAB = &H9 Public Const VK_CONTROL = &H11 Public Const VK_ESCAPE = &H1B
Public Const WH_KEYBOARD_LL = 13 Public Const LLKHF_ALTDOWN = &H20
Public Type KBDLLHOOKSTRUCT vkCode As Long scanCode As Long flags As Long time As Long dwExtraInfo As Long End Type
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_TAB) And ((p.flags And LLKHF_ALTDOWN) <> 0)) Or _ ((p.vkCode = VK_ESCAPE) And ((p.flags And LLKHF_ALTDOWN) <> 0)) Or _ ((p.vkCode = VK_ESCAPE) And ((GetKeyState(VK_CONTROL) And &H8000) <> 0)) Or _ ((p.vkCode = 91) Or (p.vkCode = 92) Or (p.vkCode = 93)) '左右Win 和徽标键 End If End If If fEatKeystroke Then LowLevelKeyboardProc = -1 Else LowLevelKeyboardProc = CallNextHookEx(0, nCode, wParam, ByVal lParam) End If End Function