实时监测Caps Lock、NumLock、Scroll Lock三个按件的状态 '.bas模块中 Public m_hDllKbdHook As Long 'public variable holding 'the handle to the hook procedure
Public Const WH_KEYBOARD_LL As Long = 13 'enables monitoring of keyboard 'input events about to be posted 'in a thread input queue
Private Const HC_ACTION As Long = 0 'wParam and lParam parameters 'contain information about a 'keyboard messagePublic Const VK_CAPITAL As Long = &H14 Public Const VK_NUMLOCK As Long = &H90 Public Const VK_SCROLL As Long = &H91 Private Const LLKHF_UP As Long = &H80& 'test the transition-state flagPublic Type KeyboardBytes kbByte(0 To 255) As Byte End TypePrivate Type KBDLLHOOKSTRUCT vkCode As Long 'a virtual-key code in the range 1 to 254 scanCode As Long 'hardware scan code for the key flags As Long 'specifies the extended-key flag, 'event-injected flag, context code, 'and transition-state flag time As Long 'time stamp for this message dwExtraInfo As Long 'extra info associated with the message End TypePublic 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 LongPublic Declare Function CallNextHookEx Lib "user32" _ (ByVal hHook As Long, _ ByVal nCode As Long, _ ByVal wParam As Long, _ ByVal lParam As Long) As Long
Public Declare Sub CopyMemory Lib "kernel32" _ Alias "RtlMoveMemory" _ (pDest As Any, _ pSource As Any, _ ByVal cb As Long)Public Declare Function GetKeyboardState Lib "user32" _ (kbArray As KeyboardBytes) As LongPublic Declare Function GetKeyState Lib "user32" _ (ByVal nVirtKey As Long) As Integer Public Function LowLevelKeyboardProc(ByVal nCode As Long, _ ByVal wParam As Long, _ ByVal lParam As Long) As Long Dim kbdllhs As KBDLLHOOKSTRUCT
If nCode = HC_ACTION Then
Call CopyMemory(kbdllhs, ByVal lParam, Len(kbdllhs)) If (kbdllhs.flags And LLKHF_UP) Then
Select Case kbdllhs.vkCode
Case VK_NUMLOCK Form1.Label1.Visible = (GetKeyState(VK_NUMLOCK) = &HFF81)
Case VK_CAPITAL Form1.Label2.Visible = (GetKeyState(VK_CAPITAL) = &HFF81)
Case VK_SCROLL Form1.Label3.Visible = (GetKeyState(VK_SCROLL) = &HFF81)
End FunctionForm1中加入3个标签控件Label1、Label2、Label3 Form1中的代码Private Sub Form_Load() Dim kbdState As KeyboardBytes Call GetKeyboardState(kbdState)
With Label1 .Caption = "Numlock is ON" .Alignment = vbRightJustify End With
With Label2 .Caption = "Caps lock is ON" .Alignment = vbRightJustify End With
With Label3 .Caption = "Scroll lock is ON" .Alignment = vbRightJustify End With
Label1.Visible = kbdState.kbByte(VK_NUMLOCK) = 1 Label2.Visible = kbdState.kbByte(VK_CAPITAL) = 1 Label3.Visible = kbdState.kbByte(VK_SCROLL) = 1 'set and obtain the handle to the keyboard hook m_hDllKbdHook = SetWindowsHookEx(WH_KEYBOARD_LL, _ AddressOf LowLevelKeyboardProc, _ App.hInstance, _ 0&) If m_hDllKbdHook = 0 Then
MsgBox "Failed to install low-level keyboard hook."
End If
End Sub Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer) If m_hDllKbdHook <> 0 Then Call UnhookWindowsHookEx(m_hDllKbdHook) End If
'.bas模块中
Public m_hDllKbdHook As Long 'public variable holding
'the handle to the hook procedure
Public Const WH_KEYBOARD_LL As Long = 13 'enables monitoring of keyboard
'input events about to be posted
'in a thread input queue
Private Const HC_ACTION As Long = 0 'wParam and lParam parameters
'contain information about a
'keyboard messagePublic Const VK_CAPITAL As Long = &H14
Public Const VK_NUMLOCK As Long = &H90
Public Const VK_SCROLL As Long = &H91
Private Const LLKHF_UP As Long = &H80& 'test the transition-state flagPublic Type KeyboardBytes
kbByte(0 To 255) As Byte
End TypePrivate Type KBDLLHOOKSTRUCT
vkCode As Long 'a virtual-key code in the range 1 to 254
scanCode As Long 'hardware scan code for the key
flags As Long 'specifies the extended-key flag,
'event-injected flag, context code,
'and transition-state flag
time As Long 'time stamp for this message
dwExtraInfo As Long 'extra info associated with the message
End TypePublic 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 LongPublic Declare Function CallNextHookEx Lib "user32" _
(ByVal hHook As Long, _
ByVal nCode As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long
Public Declare Sub CopyMemory Lib "kernel32" _
Alias "RtlMoveMemory" _
(pDest As Any, _
pSource As Any, _
ByVal cb As Long)Public Declare Function GetKeyboardState Lib "user32" _
(kbArray As KeyboardBytes) As LongPublic Declare Function GetKeyState Lib "user32" _
(ByVal nVirtKey As Long) As Integer
Public Function LowLevelKeyboardProc(ByVal nCode As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long Dim kbdllhs As KBDLLHOOKSTRUCT
If nCode = HC_ACTION Then
Call CopyMemory(kbdllhs, ByVal lParam, Len(kbdllhs)) If (kbdllhs.flags And LLKHF_UP) Then
Select Case kbdllhs.vkCode
Case VK_NUMLOCK
Form1.Label1.Visible = (GetKeyState(VK_NUMLOCK) = &HFF81)
Case VK_CAPITAL
Form1.Label2.Visible = (GetKeyState(VK_CAPITAL) = &HFF81)
Case VK_SCROLL
Form1.Label3.Visible = (GetKeyState(VK_SCROLL) = &HFF81)
Case Else
End Select
End If
End If 'nCode = HC_ACTION
LowLevelKeyboardProc = CallNextHookEx(m_hDllKbdHook, _
nCode, _
wParam, _
lParam)
End FunctionForm1中加入3个标签控件Label1、Label2、Label3
Form1中的代码Private Sub Form_Load() Dim kbdState As KeyboardBytes Call GetKeyboardState(kbdState)
With Label1
.Caption = "Numlock is ON"
.Alignment = vbRightJustify
End With
With Label2
.Caption = "Caps lock is ON"
.Alignment = vbRightJustify
End With
With Label3
.Caption = "Scroll lock is ON"
.Alignment = vbRightJustify
End With
Label1.Visible = kbdState.kbByte(VK_NUMLOCK) = 1
Label2.Visible = kbdState.kbByte(VK_CAPITAL) = 1
Label3.Visible = kbdState.kbByte(VK_SCROLL) = 1 'set and obtain the handle to the keyboard hook
m_hDllKbdHook = SetWindowsHookEx(WH_KEYBOARD_LL, _
AddressOf LowLevelKeyboardProc, _
App.hInstance, _
0&) If m_hDllKbdHook = 0 Then
MsgBox "Failed to install low-level keyboard hook."
End If
End Sub
Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer) If m_hDllKbdHook <> 0 Then
Call UnhookWindowsHookEx(m_hDllKbdHook)
End If
End Sub
acscii码?
就是按键的键值
keyascii是按键对应的字符的ascii码。VB刚学??不是吧。刚学就做这个?