Ruby：窗口打印屏幕win32API调用

Question

当您按下alt +打印屏幕时（至少在Windows中），您会获得当前活动（和可见？）窗口的屏幕截图。

如何使用win32Api调用来调用它？

Answer 1

Win32::Screenshot怎么样？ 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")