by Daniel Pramel (1 Submission)
Category: Graphics
Compatability: Visual Basic 3.0
Difficulty: Advanced
Date Added: Wed 3rd February 2021
Rating: 
(35 Votes)
Makes forms transparent like glass- coooooool effect ... WinAmp3 uses the SAME effect under win2000 and XP!!!
here on VBC are some codes, but this is 10000 times better - it autoupdates, is very fast and you can adjust the effect from 0 to 254
please vote for me :-))
Side Effects
works only under win2000 - XP
API DeclarationsOption Explicit
Declare Function GetWindowLong Lib "user32.dll" Alias "GetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long) As Long
Declare Function SetWindowLong Lib "user32.dll" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Declare Function SetLayeredWindowAttributes Lib "user32.dll" (ByVal hWnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long
Declare Function UpdateLayeredWindow Lib "user32.dll" (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
Public Type POINTAPI
x As Long
y As Long
End Type
Public Type SIZE
cx As Long
cy As Long
End Type
Public Type BLENDFUNCTION
BlendOp As Byte
BlendFlags As Byte
SourceConstantAlpha As Byte
AlphaFormat As Byte
End Type
Public Const GWL_STYLE = (-16)
Public Const GWL_EXSTYLE = (-20)
Public Const WS_EX_LAYERED = &H80000
Public Const ULW_COLORKEY = &H1
Public Const ULW_ALPHA = &H2
Public Const ULW_OPAQUE = &H4
Public Const AC_SRC_OVER = &H0
Public Const AC_SRC_ALPHA = &H1
Public Const AC_SRC_NO_PREMULT_ALPHA = &H1
Public Const AC_SRC_NO_ALPHA = &H2
Public Const AC_DST_NO_PREMULT_ALPHA = &H10
Public Const AC_DST_NO_ALPHA = &H20
Public Const LWA_COLORKEY = &H1
Public Const LWA_ALPHA = &H2
VBcodersPublic Sub Mache_Transparent(hWnd As Long, Rate As Byte)
'### funktioniert nur unter Win2000 - XP !!!
'### macht das Fenster, dessen hWnd übergeben wurde, transparent
'### Rate: 254 = normal 0 = ganz transparent
'### 190 ist z.B. ein guter Wert
Dim WinInfo As Long
WinInfo = GetWindowLong(hWnd, GWL_EXSTYLE)
WinInfo = WinInfo Or WS_EX_LAYERED
SetWindowLong hWnd, GWL_EXSTYLE, WinInfo
SetLayeredWindowAttributes hWnd, 0, Rate, LWA_ALPHA
End Sub
