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 WS_EX_LAYERED = &H80000 Private Const GWL_EXSTYLE = (-20) Private Const LWA_ALPHA = &H2 Private Const LWA_COLORKEY = &H1 Private Sub Form_Load() Dim rtn As Long rtn = GetWindowLong(hwnd, GWL_EXSTYLE) rtn = rtn Or WS_EX_LAYERED SetWindowLong hwnd, GWL_EXSTYLE, rtn SetLayeredWindowAttributes hwnd, 0, 200, LWA_ALPHA '第3个参数表示透明程度 End Sub
我按faysky2()的方法试的也没有问题呀
找了一个实例给你Option ExplicitPrivate 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 LongPrivate Const WS_EX_LAYERED = &H80000 Private Const GWL_EXSTYLE = (-20) Private Const LWA_ALPHA = &H2Private Sub Form_Load() Dim FormStyle As Long
' 取的窗口原先的样式 FormStyle = GetWindowLong(Me.hwnd, GWL_EXSTYLE) ' 使窗体添加上新的样式WS_EX_LAYERED FormStyle = FormStyle Or WS_EX_LAYERED ' 把新的样式赋给窗体 SetWindowLong Me.hwnd, GWL_EXSTYLE, FormStyle ' 设置窗体为半透明 SetLayeredWindowAttributes Me.hwnd, 0, 152, LWA_ALPHA End Sub
http://community.csdn.net/Expert/topic/4495/4495241.xml?temp=3.670901E-02
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 WS_EX_LAYERED = &H80000
Private Const GWL_EXSTYLE = (-20)
Private Const LWA_ALPHA = &H2
Private Const LWA_COLORKEY = &H1
Private Sub Form_Load()
Dim rtn As Long
rtn = GetWindowLong(hwnd, GWL_EXSTYLE)
rtn = rtn Or WS_EX_LAYERED
SetWindowLong hwnd, GWL_EXSTYLE, rtn
SetLayeredWindowAttributes hwnd, 0, 200, LWA_ALPHA '第3个参数表示透明程度
End Sub
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 LongPrivate Const WS_EX_LAYERED = &H80000
Private Const GWL_EXSTYLE = (-20)
Private Const LWA_ALPHA = &H2Private Sub Form_Load()
Dim FormStyle As Long
' 取的窗口原先的样式
FormStyle = GetWindowLong(Me.hwnd, GWL_EXSTYLE)
' 使窗体添加上新的样式WS_EX_LAYERED
FormStyle = FormStyle Or WS_EX_LAYERED
' 把新的样式赋给窗体
SetWindowLong Me.hwnd, GWL_EXSTYLE, FormStyle
' 设置窗体为半透明
SetLayeredWindowAttributes Me.hwnd, 0, 152, LWA_ALPHA
End Sub