Forum: Ruby Setting the mouse position

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Gues (Guest)
on 2005-12-27 15:40

How can I set the mouse position? So change the mouse to a specified
(x,y) on the screen?


How can I get the location of a window on the screen of which I know the

Ryan L. (Guest)
on 2005-12-27 19:57
(Received via mailing list)
I assume you are asking about Microsoft Windows. This is a very
specific question which is more related to Windows programming and the
Windows API than Ruby programming. But nonetheless:

1. To set the mouse position you need the SetCursorPos function, which
you can access from Ruby like so:

require 'Win32API'

setCursorPos ="user32", "SetCursorPos", ['I','I'], 'V')

2. To get the location of a Window whose title you know, do the

require 'Win32API'

findWindow ="user32", "FindWindow", ['P','P'], 'L')
getClientRect ="user32", "GetClientRect", ['P','P'], 'V')
hwnd = findWindow.Call(nil, 'name of window here')
lpRect = " " * 16 # Four LONGs
getClientRect.Call(hwnd, lpRect)
left, top, right, bottom = lpRect.unpack('LLLL')
puts "Left: #{left}, Top: #{top}, Right: #{right}, Bottom: #{bottom}"

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