C# Vista下将Area效果应用到整个窗体

Vista下将Area效果应用到整个窗体   最近在找其它资源时，无意间发现了一个程序可以将Area效果应用到整个窗体。感觉挺有意思，看了一下代码还是挺简单的。 首先需要两个API，DwmIsCompositionEnabled和DwmExtendFrameIntoClientArea。 DwmIsCompositionEnabled是用来判断系统是否开启了Area效果，当为False时为没有开启，这时有两种情况一个是系统不支持，另外一种是用户手动关闭了效果。如果是用户手动关闭的，你仍然可以使你的程序具有Area效果。否则是不可以的。 DwmExtendFrameIntoClientArea是用来使你的窗体具有Area效果，可以是整个窗体，也可以是窗体的一部分。这个函数的第一个参数是需要应用Area效果窗体的Handle，第二个参数是一个MARGINS结构可以指定在窗体的什么部位应用Area效果，如果是全部可以设置为-1，如果取消Area效果可以设置为0。 下面看一下这两个API的声明。 1         [DllImport("dwmapi.dll", PreserveSig =false)] 2        staticexternvoid DwmExtendFrameIntoClientArea(IntPtr hwnd, ref MARGINS margins); 3 4         [DllImport("dwmapi.dll", PreserveSig =false)] 5        staticexternbool DwmIsCompositionEnabled(); 下面就是实现的代码了。 设置Area效果 1        publicstaticbool Enable(Window window) 2        { 3            try 4            { 5                if (!DwmIsCompositionEnabled()) 6                    returnfalse; 7 8                 IntPtr hwnd =new WindowInteropHelper(window).Handle; 9                if (hwnd == IntPtr.Zero) 10                    thrownew InvalidOperationException("The Window must be shown before extending glass."); 11 12                // Set the background to transparent from both the WPF and Win32 perspectives 13                 window.Background = System.Windows.Media.Brushes.Transparent; 14                 HwndSource.FromHwnd(hwnd).CompositionTarget.BackgroundColor = Colors.Transparent; 15 16                 MARGINS margins =new MARGINS(-1); 17                 DwmExtendFrameIntoClientArea(hwnd, ref margins); 18                returntrue; 19             } 20            catch (Exception ex) 21            { 22                // could not change glass, but continue                    23                 System.Diagnostics.Debug.WriteLine(ex.Message); 24                returnfalse; 25             } 26         } 取消Area效果 1        publicstaticbool Disable(Window window) 2        { 3            try 4            { 5                if (!DwmIsCompositionEnabled()) 6                    returnfalse; 7 8                 IntPtr hwnd =new WindowInteropHelper(window).Handle; 9                if (hwnd == IntPtr.Zero) 10                    thrownew InvalidOperationException("The Window must be shown before extending glass."); 11 12                // Set the background to transparent from both the WPF and Win32 perspectives 13                 window.Background =new SolidColorBrush(System.Windows.SystemColors.WindowColor); 14                 HwndSource.FromHwnd(hwnd).CompositionTarget.BackgroundColor = System.Windows.SystemColors.WindowColor; 15 16                 MARGINS margins =new MARGINS(0); 17                 DwmExtendFrameIntoClientArea(hwnd, ref margins); 18                returntrue; 19             } 20            catch (Exception ex) 21            { 22                // could not change glass, but continue                    23                 System.Diagnostics.Debug.WriteLine(ex.Message); 24                returnfalse; 25             } 26         }