关于窗体透明的新方法.docVIP

关于窗体透明的新方法.txt“我羡慕内些老人 羡慕他们手牵手一直走到最后。━交话费的时候，才发现自己的话那么值钱。今天，跟陈文同志探讨了一下，想到了现在的迅雷7的透明效果，迅雷的透明度似乎是统一的。^V^ 个人认为UpdateLayeredWindow()可以实现透明的需求，只不过调用该函数窗体无法显示其他控件。、 我的调用方法 private void SetAlphaBorder(Bitmap bit,Point location) { if (!haveHandle) return; if (!Bitmap.IsCanonicalPixelFormat(bit.PixelFormat) || !Bitmap.IsAlphaPixelFormat(bit.PixelFormat)) throw new ApplicationException(图片必须是32位带Alhpa通道的图片。); IntPtr oldBits = IntPtr.Zero; IntPtr screenDC = Win32.GetWindowDC(IntPtr.Zero); IntPtr hBitmap = IntPtr.Zero; IntPtr memDc = Win32.CreateCompatibleDC(screenDC); try { Win32.Point topLoc = new Win32.Point(location.X, location.Y); Win32.Size bitMapSize = new Win32.Size(bit.Width, bit.Height); Win32.BLENDFUNCTION blendFunc = new Win32.BLENDFUNCTION(); Win32.Point srcLoc = new Win32.Point(0, 0); hBitmap = bit.GetHbitmap(Color.FromArgb(0)); oldBits = Win32.SelectObject(memDc, hBitmap); blendFunc.BlendOp = Win32.AC_SRC_OVER; blendFunc.SourceConstantAlpha = 255; blendFunc.AlphaFormat = Win32.AC_SRC_ALPHA; blendFunc.BlendFlags = 0; Win32.UpdateLayeredWindow(Handle, screenDC, ref topLoc, ref bitMapSize, memDc, ref srcLoc, 0, ref blendFunc, Win32.ULW_ALPHA); } finally { if (hBitmap != IntPtr.Zero) { Win32.SelectObject(memDc, oldBits); Win32.DeleteObject(hBitmap); } Win32.ReleaseDC(IntPtr.Zero, screenDC); Win32.DeleteDC(memDc); } } UpdateLayeredWindow()函数原型 [DllImport(user32.dll, ExactSpelling = true, SetLastError = true)] public static extern int UpdateLayeredWindow(IntPtr hWnd, IntPtr hdcDst, ref Point pptDst, re