Ruby clicker example

require 'win32/api'
require 'win32con'
require 'win32con/keymap'

# Include Win32 Constants for more convenient access
include Win32CON

# Win32 APIs
GetAsyncKeyState = Win32::API.new('GetAsyncKeyState', 'L', 'L', 'user32')
MouseEvent = Win32::API.new('mouse_event', 'LLLLP', 'L', 'user32')

# Input module
module Input

  # initialize keystates
  @keystate = Array.new(0xff){0}

  module_function

  # keystate getter
  def keystate; @keystate; end

  # Input main update
  def update
    0xff.times do |i|
      # SHORT to BOOL
      pressed = (GetAsyncKeyState.call(i) & 0x8000) > 0
      @keystate[i] = pressed ? (@keystate[i] + 1) : 0
    end
  end

  # mouse right down
  def right_down
    MouseEvent.call(MOUSEEVENTF_RIGHTDOWN, 0, 0, 0, 0)
  end

  # mouse right up
  def right_up
    MouseEvent.call(MOUSEEVENTF_RIGHTUP, 0, 0, 0, 0)
  end

  # mouse right click
  def right_click
    right_down
    sleep(0.01)
    right_up
  end

  # Whether the key is just pressed down
  def trigger?(key)
    @keystate[key] == 1
  end

  # Whether the key is pressed
  def pressed?(key)
    @keystate[key] >= 1
  end

  # Get length of the key being pressed
  def repeat?(key)
    @keystate[key]
  end
end

# Update per second
FPS = 120

# Sleep time between updates
TickSleepTime = (1 / 120)

begin
  loop do
    sleep(TickSleepTime)
    Input.update
    Input.right_down if Input.trigger?(Keymap[:vk_F7])
    Input.right_up   if Input.trigger?(Keymap[:vk_F8])
    exit             if Input.trigger?(Keymap[:vk_F9])
  end
rescue SystemExit, Interrupt
  puts "Bye!"
ensure
  # ensure the mouse right key is released
  Input.right_up
end