vb窗体半透明:VB中制作半透明窗体来源: 发布时间:星期六, 2009年3月28日 浏览:0次 评论:0
AnimateWindow是 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Public Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte,中国教程在线,http://www.5istudy.cnByVal dwFlags As Long) As Long 注释:具体可以使用 ![]() Const LWA_ALPHA=&H2 注释:表示把窗体设置成半透明样式 Const LWA_COLORKEY=&H1 注释:表示不显示窗体中 ![]() hwnd是透明窗体 ![]() crKey为颜色值 ![]() bAlpha是透明度 ![]() ![]() dwFlags是透明方式 ![]() 当取值为LWA_ALPHA时 ![]() ![]() 当取值为LWA_COLORKEY时 ![]() ![]() ![]() ![]() LWA_ALPHA = 0x2 LWA_COLORKEY=0x1 也可以取两个值 ![]() ![]() ![]() ![]() ![]() 要使使窗体拥有透明效果,首先要有WS_EX_LAYERED扩展属性 (旧 ![]() WS_EX_LAYERED = 0x80000 具体例子 ![]() Module1 Public Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long Public Const WS_EX_LAYERED = &H80000 Public Const GWL_EXSTYLE = (-20) Public Const LWA_ALPHA = &H2 Public Const LWA_COLORKEY = &H1 Public Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Form1 Private Sub Form_Load ![]() Dim rtn As Long rtn = GetWindowLong(Me.hwnd, GWL_EXSTYLE) 注释:取 ![]() ![]() ![]() ![]() SetLayeredWindowAttributes (Me.Handle 0, 192, LWA_ALPHA ) 注释:把窗体设置成半透明样式,第 2个参数表示透明程度 注释:取值范围0--255,为0时就是 ![]() ![]() End Sub 第 2种使用思路方法 SetLayeredWindowAttributes (Me.Handle, &H0, 0, LWA_COLORKEY ) 注释:表明不显示窗体中 ![]() 注释:而第 2个参数表示透明色为黑色,并且你可以用RGB ![]() Win32.UpdateLayeredWindow(Handle, screenDc, topPos, size, memDc, po ![]() 0
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