ruby - Ruby：窗口打印屏幕win32API调用

Question

当您按下 alt+printscreen（至少在 Windows 中）时，您将获得当前活动（并且可见？）窗口的屏幕截图。

如何使用 win32Api 调用来调用它？

Answer 1

怎么样Win32::Screenshot？
https://github.com/jarmo/win32screenshot

gem install win32screenshot    

require 'win32/screenshot'

# Take a screenshot of the foreground
Win32::Screenshot::Take.of(:foreground).write("image.png")

# Take a screenshot of the window with the specified title
Win32::Screenshot::Take.of(:window, :title => "Abc").write("image.bmp")