以台式机的屏幕截图当Windows被锁定（WIN + L） [英] Take screenshot of desktop when Windows is locked (Win+L)

问题描述

我想利用桌面的截图，而Windows被锁定（与Win + L）。标准方法使一个黑色的屏幕，以像素的code：

I want to take a screenshot of desktop while Windows is locked (with Win+L). Standard methods make a black screen, with code of pixel:

COLORREF color = GetPixel(hdc, x, y);

等于-1，。无论是用户模式程序，也不是服务，可以捕捉有用的图像。任何想法？

equal -1. Neither a user mode program nor a service could capture a useful image. Any ideas?

推荐答案

GetPixel 和的BitBlt 将无法正常工作当桌面是不实际显示在监视器上。

GetPixel and BitBlt won't work when the desktop isn't physically displayed on the monitor.

您可能有一些运气捕捉各个窗口与 PrintWindow 。然而，并非所有的应用程序响应 PrintWindow 要求以同样的方式，所以你可能会看到毛刺和/或黑色。您还需要单独捕获每一个窗口。

You may have some luck capturing individual windows with PrintWindow. However, not all applications respond to PrintWindow calls the same way, so you may see glitches and/or blackness. You'll also need to capture each window individually.

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