From: Phil Smy <phil@...>
Date: 2009-05-07T17:57:21+09:00
Subject: Re: calling winapi for EnumDisplayMonitors

Hi Park,
In short - you rule!
Thanks - this does exactly what we need. I guess I need to do some 
reading up on win32-api to understand HOW it does it, but this is a 
great start.
Much appreciated.

Heesob Park wrote:
> Here is a win32-api sample:
> 
> require 'win32/api'
> 
> EnumDisplayMonitors = Win32::API.new('EnumDisplayMonitors', 'LPKL',
> 'B', 'user32')
> GetMonitorInfo = Win32::API.new('GetMonitorInfo', 'LP', 'B', 'user32')
> 
> MyInfoEnumProc = Win32::API::Callback.new('LLPL','L') {
> |hMonitor,hdcMonitor,lprcMonitor,dwData|
>   lpmi = [72].pack('L') + 0.chr * 68
>   GetMonitorInfo.call(hMonitor,lpmi)
>   info = lpmi.unpack('L10Z*')
>   puts "Name:#{info[10]}, Width:#{info[3]}, Height:#{info[4]} "
>   1
> }
> 
> EnumDisplayMonitors.call(0, nil, MyInfoEnumProc, 0)
> 
> 
> Regards,
> Park Heesob

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