20分求助win32窗口透明代码
发布网友
发布时间：2022-04-23 12:46
共1个回答
热心网友
时间：2023-05-18 07:41
这是我正在写的，把窗体设置成无边框的 ，Form_MouseDown 的代码是为了移动无边框
SetLayeredWindowAttributes Me.hwnd, vbRed, 100, LWA_ALPHA Or LWA_COLORKEY这句代码可以设置透明的颜色和窗体的透明度
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 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 ReleaseCapture Lib "user32" () As Long
Private Declare Function SendMessage Lib "user32" _
Alias "SendMessageA" ( _
ByVal hwnd As Long, ByVal wMsg As Long, _
ByVal wParam As Long, lParam As Any) As Long
Const HTCAPTION = 2
Const WM_NCLBUTTONDOWN = &HA1
Const WS_EX_LAYERED = &H80000
Const GWL_EXSTYLE = (-20)
Const LWA_ALPHA = &H2
Const LWA_COLORKEY = &H1
Private Sub Form_Load()
Dim sty As Long
sty = GetWindowLong(Me.hwnd, GWL_EXSTYLE)
sty = sty Or WS_EX_LAYERED
SetWindowLong Me.hwnd, GWL_EXSTYLE, sty
SetLayeredWindowAttributes Me.hwnd, vbRed, 100, LWA_ALPHA Or LWA_COLORKEY
End Sub
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
ReleaseCapture
SendMessage hwnd, WM_NCLBUTTONDOWN, HTCAPTION, 0&
End Sub
