From: daz <dooby@...10.karoo.co.uk>
Date: 2005-11-26T11:07:27+09:00
Subject: Re: How to make a system tray program in Windows?


Sung Soo Kim wrote:

> How can I make my program appear in the system tray of the Windows?
>
> What I want my program do is to keep track of time regularly (using
> timer) and do something behind the scene. (like a scheduler.)
> So, I want to make my program disappear from main desktop and appear in the
> system tray.
>
> What can I do?

This puts a green tick in the SysTray, then changes it to a red minus
(No Entry sign in UK), then removes it.  Delays in between (sleep).

I was going to send a traffic light sequence but I'm not certain whether
it's using a generally available DLL.  I think most will have INETCPL.CPL

You can use any DLL that has icon(s), probably .EXE also ?

Have fun,


daz


#-------------------------------------------------------------------------------

require 'Win32API'

RT_ICON         =  3
DIFFERENCE      = 11
RT_GROUP_ICON   = RT_ICON + DIFFERENCE

NIF_MESSAGE = 1
NIF_ICON    = 2
NIF_TIP     = 4
NIM_ADD     = 0
NIM_MODIFY  = 1
NIM_DELETE  = 2


ExtractIcon       = Win32API.new('shell32',  'ExtractIcon',       'LPI',  'L')
Shell_NotifyIcon  = Win32API.new('shell32',  'Shell_NotifyIconA', 'LP',   'I')


hicoY = ExtractIcon.call(0, 'C:\WINDOWS\SYSTEM\INETCPL.CPL', 21)  # Green tick
hicoN = ExtractIcon.call(0, 'C:\WINDOWS\SYSTEM\INETCPL.CPL', 22)  # Red minus

tiptxt = 'test icon (ruby)'
pnid = [6*4+64, 0, 'ruby'.hash, NIF_ICON | NIF_TIP, 0, hicoY].pack('LLIIIL') <<
       tiptxt << "\0"*(64 - tiptxt.size)
ret = Shell_NotifyIcon.call(NIM_ADD, pnid)
p 'Err: NIM_ADD' if ret == 0

      sleep(3)   #  <----<<

pnid = [6*4+64, 0, 'ruby'.hash, NIF_ICON | NIF_TIP, 0, hicoN].pack('LLIIIL') <<
       tiptxt << "\0"*(64 - tiptxt.size)
ret = Shell_NotifyIcon.call(NIM_MODIFY, pnid)
p 'Err: NIM_MODIFY' if ret == 0

      sleep(6)   #  <----<<

pnid = [6*4+64, 0, 'ruby'.hash, 0, 0, 0].pack('LLIIIL') << "\0"
ret = Shell_NotifyIcon.call(NIM_DELETE, pnid)
p 'Err: NIM_DELETE' if ret == 0

#-------------------------------------------------------------------------------