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view ruby/rbdc/examples/win32screenres.rb @ 34:2682a627168c

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- breaking changes: * restrict 'Z' conversions to immutable types * restrict 'p' to mutable types (and handles)
author Tassilo Philipp
date Sun, 12 Apr 2020 19:37:37 +0200
parents 5e159be89d73
children
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#//////////////////////////////////////////////////////////////////////
#
#	win32screeninfo.rb
#	Copyright 2015 Tassilo Philipp
#
#	Dyncall sample loading user32.dll on windows and displaying a
#	native windows message box by calling MessageBoxA(...).
#
#///////////////////////////////////////////////////////////////////////

require 'rbdc'

l = Dyncall::ExtLib.new
if l.load('user32') != nil
  puts 'width:                ' + l.call(:GetSystemMetrics, 'i)i',  0).to_s
  puts 'height:               ' + l.call(:GetSystemMetrics, 'i)i',  1).to_s
  puts 'number of monitors:   ' + l.call(:GetSystemMetrics, 'i)i', 80).to_s
end