c# - C# - mouse hover in taskbar, thumbnails preview is generated in window 7.

Question

I am developing one application which shows thumbnails of running application on windows 7. Can i achieve the same thumbnail functionality on window XP.(If I run my application on XP) If Yes. Then How can i achieve this. Any idea? Thanks

Answer 1

在 Windows 7 中，您可以使用桌面窗口管理器(DWM) 库（除其他外）来截取屏幕截图/缩略图。该文档是 Win API 的一部分，但您可以使用平台调用在 C3 中使用它们：

[DllImport( "dwmapi.dll", PreserveSig = false )]
public static extern void DwmRegisterThumbnail( IntPtr destinationWindowHandle, IntPtr sourceWindowHandle, out IntPtr thumbnailHandle );

[DllImport( "dwmapi.dll", PreserveSig = false )]
public static extern void DwmUnregisterThumbnail( IntPtr thumbnailHandle );

[DllImport( "dwmapi.dll", PreserveSig = false )]
public static extern void DwmUpdateThumbnailProperties( IntPtr thumbnailHandle, ref ThumbnailProperties properties );

最后，这里是一些关于如何实现实际缩略图的示例代码。