Transparant Form VB

Module.BAS

Option Explicit
Private Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long
Private Declare Function UpdateLayeredWindow Lib "user32" (ByVal hwnd As Long, ByVal hDCDst As Long, pptDst As Any, psize As Any, ByVal hDCSrc As Long, pptSrc As Any, crKey As Long, ByVal pblend As Long, ByVal dwFlags As Long) As Long
Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long
Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long


Private Const GWL_EXSTYLE = (-20)
Private Const LWA_COLORKEY = &H1
Private Const LWA_ALPHA = &H2
Private Const ULW_COLORKEY = &H1
Private Const ULW_ALPHA = &H2
Private Const ULW_OPAQUE = &H4
Private Const WS_EX_LAYERED = &H80000

Public Function isTransparent(ByVal hwnd As Long) As Boolean
On Error Resume Next
Dim Msg As Long
Msg = GetWindowLong(hwnd, GWL_EXSTYLE)
  If (Msg And WS_EX_LAYERED) = WS_EX_LAYERED Then
       isTransparent = True
  Else
       isTransparent = False
  End If

  If Err Then
       isTransparent = False
  End If
End Function

Public Function MakeTransparent(ByVal hwnd As Long, Perc As Integer) As Long
Dim Msg As Long
On Error Resume Next
  If Perc <> 255 Then
       MakeTransparent = 1
  Else
       Msg = GetWindowLong(hwnd, GWL_EXSTYLE)
       Msg = Msg Or WS_EX_LAYERED
       SetWindowLong hwnd, GWL_EXSTYLE, Msg
       SetLayeredWindowAttributes hwnd, 0, Perc, LWA_ALPHA
       MakeTransparent = 0
  End If

  If Err Then
       MakeTransparent = 2
  End If
End Function

Public Function MakeOpaque(ByVal hwnd As Long) As Long
Dim Msg As Long
On Error Resume Next
Msg = GetWindowLong(hwnd, GWL_EXSTYLE)
Msg = Msg And Not WS_EX_LAYERED
SetWindowLong hwnd, GWL_EXSTYLE, Msg
SetLayeredWindowAttributes hwnd, 0, 0, LWA_ALPHA
MakeOpaque = 0
  If Err Then
       MakeOpaque = 2
  End If
End Function

Form1

Option Explicit
Dim a As Integer

Private Sub Form_Load()
MakeTransparent Me.hwnd, 0
Timer1.Enabled = True
a = 0
End Sub

Private Sub Timer1_Timer()
a = a + 5
  If a <= 600 Then
       MakeTransparent Me.hwnd, a
  Else
       MakeTransparent Me.hwnd, 255
       Timer1.Enabled = False
  End If
End Sub

Komponen ...

Timer1
Enabled = True
Interval = 1

DOWNLOAD SAMPEL