Binaryworld - SetCapsLockKey - Set the state of the Caps Lock key ... [ VB -> Keyboard-Mouse ]

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 GetKeyState Lib "user32" (ByVal nVirtKey As Long) As _
  Long
Private Const KEYEVENTF_KEYUP = &H2

Sub SetCapsLockKey(ByVal newState As Boolean)
  ' if the current state must be changed
  If CBool(GetKeyState(vbKeyCapital)) <> newState Then
    ' programmatically press and release the CapsLock key
    keybd_event vbKeyCapital, 0, 0, 0
    keybd_event vbKeyCapital, 0, KEYEVENTF_KEYUP, 0
  End If
End Sub