Прозрачность формы на Visual Basic 6.0

Private Declare Function SetWindowLongA Lib "user32" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long
Const LWA_COLORKEY = &H1
Const LWA_ALPHA = &H2
Const GWL_EXSTYLE = (-20)
Const WS_EX_LAYERED = &H80000

Private Sub Form_Load()
SetWindowLongA Me.hwnd, GWL_EXSTYLE, WS_EX_LAYERED
SetLayeredWindowAttributes Me.hwnd, vbWhite, 0, LWA_COLORKEY
End Sub

Private Sub Label1_DblClick()
End
End Sub

Но после такого остаёться кантик во круг текста Label.