半透明窗体.frm

来自「个人VB学习源码精选,自己学习时的一些编程小程序,希望对大家有帮助」· FRM 代码 · 共 34 行

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
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 crkey As Long, ByVal balpha As Byte, ByVal dwflags As Long) As Long
Private Const GWL_EXSTYLE = (-20)
Private Const WS_EX_LAYERED = &H80000
Private Const LWA_ALPHA = &H2
Private Const LWA_COLORKEY = &H1

Private Sub Form_Load()
    Dim Rtn As Long
    Rtn = GetWindowLong(Me.hwnd, GWL_EXSTYLE)
    Rtn = Rtn Or WS_EX_LAYERED
    SetWindowLong hwnd, GWL_EXSTYLE, Rtn
    SetLayeredWindowAttributes Me.hwnd, 0, 150, LWA_ALPHA
End Sub