Encender y Apagar Num, Caps y Scroll Lock

Private Type OSVERSIONINFO
    dwOSVersionInfoSize As Long
    dwMajorVersion As Long
    dwMinorVersion As Long
    dwBuildNumber As Long
    dwPlatformId As Long
    szCSDVersion As String * 128
End Type
Private Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA" (lpVersionInformation As OSVERSIONINFO) As Long
Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
Private Declare Function GetKeyboardState Lib "user32" (pbKeyState As Byte) As Long
Private Declare Function SetKeyboardState Lib "user32" (lppbKeyState As Byte) As Long
Const VK_NUMLOCK = &H90
Const VK_SCROLL = &H91
Const VK_CAPITAL = &H14
Const KEYEVENTF_EXTENDEDKEY = &H1
Const KEYEVENTF_KEYUP = &H2
Const VER_PLATFORM_WIN32_NT = 2
Const VER_PLATFORM_WIN32_WINDOWS = 1
Dim o As OSVERSIONINFO
Dim NumLockState As Boolean
Dim ScrollLockState As Boolean
Dim CapsLockState As Boolean

Private Sub Num_Lock_Click()
o.dwOSVersionInfoSize = Len(o)
GetVersionEx o
Dim keys(0 To 255) As Byte
GetKeyboardState keys(0)
NumLockState = keys(VK_NUMLOCK)
If NumLockState <> True Then
    'Poner numlock a on
    If o.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS Then
        'Si es Win95
        keys(VK_NUMLOCK) = 1
        SetKeyboardState keys(0)
    ElseIf o.dwPlatformId = VER_PLATFORM_WIN32_NT Then
        'Si es WinNT
        keybd_event VK_NUMLOCK, &H45, KEYEVENTF_EXTENDEDKEY Or 0, 0
        keybd_event VK_NUMLOCK, &H45, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0
    End If
 Else
'Poner Num_Lock a Off
If o.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS Then
        keys(VK_NUMLOCK) = 0
        SetKeyboardState keys(0)
        ElseIf o.dwPlatformId = VER_PLATFORM_WIN32_NT Then
        keybd_event VK_NUMLOCK, &H45, KEYEVENTF_EXTENDEDKEY Or 0, 0
         keybd_event VK_NUMLOCK, &H45, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0
    End If
End If
End Sub

Private Sub Caps_Lock_Click()
o.dwOSVersionInfoSize = Len(o)
GetVersionEx o
Dim keys(0 To 255) As Byte
GetKeyboardState keys(0)
CapsLockState = keys(VK_CAPITAL)
If CapsLockState <> True Then
    If o.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS Then
        keys(VK_CAPITAL) = 1
        SetKeyboardState keys(0)
    ElseIf o.dwPlatformId = VER_PLATFORM_WIN32_NT Then
        keybd_event VK_CAPITAL, &H45, KEYEVENTF_EXTENDEDKEY Or 0, 0
        keybd_event VK_CAPITAL, &H45, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0
    End If
 Else
 If o.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS Then
        keys(VK_CAPITAL) = 0
        SetKeyboardState keys(0)
    ElseIf o.dwPlatformId = VER_PLATFORM_WIN32_NT Then
        keybd_event VK_CAPITAL, &H45, KEYEVENTF_EXTENDEDKEY Or 0, 0
        keybd_event VK_CAPITAL, &H45, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0
    End If
End If
End Sub

Private Sub Scroll_Lock_Click()
o.dwOSVersionInfoSize = Len(o)
GetVersionEx o
Dim keys(0 To 255) As Byte
GetKeyboardState keys(0)
ScrollLockState = keys(VK_SCROLL)
If ScrollLockState <> True Then
    If o.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS Then
        keys(VK_SCROLL) = 1
        SetKeyboardState keys(0)
    ElseIf o.dwPlatformId = VER_PLATFORM_WIN32_NT Then
        keybd_event VK_SCROLL, &H45, KEYEVENTF_EXTENDEDKEY Or 0, 0
        keybd_event VK_SCROLL, &H45, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0
    End If
Else
If o.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS Then
        keys(VK_SCROLL) = 0
        SetKeyboardState keys(0)
    ElseIf o.dwPlatformId = VER_PLATFORM_WIN32_NT Then
        keybd_event VK_SCROLL, &H45, KEYEVENTF_EXTENDEDKEY Or 0, 0
        keybd_event VK_SCROLL, &H45, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0
    End If
End If
End Sub