' Module1.bas

Option Explicit
 
Private Const WM_KEYDOWN = &H100
Private Const WM_KEYUP = &H101
Private Const WM_SYSKEYDOWN = &H104
Private Const WM_SYSKEYUP = &H105
 
Public Type KBDLLHOOKSTRUCT
    vkCode As Long              ' 虛擬按鍵碼(1--254)
    scanCode As Long            ' 硬體按鍵掃描碼
    flags As
 
 Long               ' flags
    time As Long                ' 訊息時間戳
    dwExtraInfo As Long         ' 額外資訊
End Type
 
Public Enum KEYACTION
    ACTION_KEYDOWN = WM_KEYDOWN
    ACTION_KEYUP = WM_KEYUP
    ACTION_SYSKEYDOWN = WM_SYSKEYDOWN
    ACTION_SYSKEYUP = WM_SYSKEYUP
End Enum
 
' 全域性鍵盤鉤子回撥函式
' 引數:
 
 action 標識鍵盤訊息(按下,彈起), keyStruct 包含按鍵資訊
Public Function KeyboardProc(ByVal action As KEYACTION, keyStruct As KBDLLHOOKSTRUCT) As Boolean
    Select Case action
        Case ACTION_KEYDOWN
            Debug.Print keyStruct.vkCode, "按下鍵盤按鍵"
        Case ACTION_KEYUP
            Debug.Print keyStruct.vkCode,
 
 "彈起鍵盤按鍵"
        Case ACTION_SYSKEYDOWN
       
        Case ACTION_SYSKEYUP
       
    End Select
   
    ' 返回 True 表示繼續傳遞按鍵訊息
    ' 返回 False 表示結束按鍵訊息傳遞
    KeyboardProc = False
End Function

' Form1.frm
' 窗體上新增1個CommandButton，改名為cmdStartMask

Option Explicit
Private Declare Function StartMaskKey Lib "MaskKey" (lpdwVirtualKey As Long, ByVal nLength As Long, Optional ByVal bDisableKeyboard As Boolean = False) As Long
Private Declare Function StopMaskKey Lib "MaskKey" () As Long
   
Private Sub cmdStartMask_Click()
    Dim key(7) As Long
    key(0) = vbKeyPageUp
    key(1) = vbKeyPageDown
    key(2) = vbKeyReturn
    key(3) = vbKeyLeft
    key(4) = vbKeyRight
    key(5) = vbKeyUp
    key(6) = vbKeyDown
    key(7) = vbKeySpace
If cmdStartMask.Caption = "開始遮蔽" Then
StartMaskKey key(0), UBound(key) + 1
cmdStartMask.Caption = "停止遮蔽"
Else
StopMaskKey
cmdStartMask.Caption = "開始遮蔽"
End If
End Sub
   
Private Sub Form_Unload(Cancel As Integer)
If cmdStartMask.Caption = "停止遮蔽" Then
StopMaskKey
End If
End Sub

MaskKey.dll原始碼及VC++呼叫請檢視原文（原文下載連結已失效）