Option Explicit
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 Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hWnd As Long, ByVal color As Long, ByVal x As Byte, ByVal alpha As Long) As Boolean
Const LWA_BOTH = 3
Const LWA_ALPHA = 2
Const LWA_COLORKEY = 1
Const GWL_EXSTYLE = -20
Const WS_EX_LAYERED = &H80000
Dim iTransparant As Integer
Sub MakeTransparan(hWndBro As Long, iTransp As Integer)
On Error Resume Next
Dim ret As Long
ret = GetWindowLong(hWndBro, GWL_EXSTYLE)
SetWindowLong hWndBro, GWL_EXSTYLE, ret Or WS_EX_LAYERED
SetLayeredWindowAttributes hWndBro, RGB(255, 255, 0), iTransp, LWA_ALPHA
Exit Sub
End Sub
Contoh penggunaan membuat form semi transparan
Option Explicit
Private Sub Form_Load()
On Error Resume Next
MakeTransparan Me.hWnd, 75
End Sub