I've used all versions of Windows and from Windows 95 onwards, I've only seen
this happen when Explorer has crashed. It's up to the individual applications
to re-create the system tray icons when the tray is re-created after an
Explorer crash.
When explorer closes and is re-started, it does not know what was in the system
tray previously, nor what is supposed to be there. When the shell re-starts,
it sends a system-wide broadcast message, WM_TASKBARCREATED. Since this is a
broadcast message, all running apps are supposed to hear this message and if
they have system tray icons, recreate them.
I recently had a complaint that my app was not doing this so I investigated it
and modified the RxTrayIcon component I use to check for this message.
Ross.
----- Original Message -----
From: Rohit Gupta
To: [EMAIL PROTECTED] ; NZ Borland Developers Group - Delphi List
Sent: Thursday, April 12, 2007 8:41 AM
Subject: Re: [DUG] Delphi disappearing from taskbar
Its a bug in Windows, fullstop (ie in all versions). Despite the three major
rewrites they have done. :-)
John Bird wrote:
I have seen this with other icons also disappearing from the task bar. A
rare occurrence but I am sure!. I am fairly sure this is a bug in XP, as it
is not to do with certain programs - eg sometimes Outlook disappears,
sometimes Firefox, sometimes something else. The Alt/Tab list does still
have it.
Related is the one where the task bar icon is highighted (ie has focus) but
the window is nowhere to be seen. I have to minimise and maximise the
window sometimes a couple of times to get it back in front. This is a bit
more common on my PC that the first one...
John
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Alister Christie
Sent: Wednesday, 11 April 2007 4:33 p.m.
To: NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] Delphi disappearing from taskbar
Hmmm, yup that puts it back, I'm sure there is a reasonable explanation
for this - but I doubt I'll ever know it
Alister Christie
Computers for People
Ph: 04 471 1849 Fax: 04 471 1266
http://www.salespartner.co.nz
PO Box 13085
Johnsonville
Wellington
Jeremy North wrote:
If you have D2007 installed, minimize and maximize the IDE. If you
don't have D2006 installed - then I happen experienced it myself.
On 4/11/07, Alister Christie <[EMAIL PROTECTED]> wrote:
I don't know if anyone else has seen this, but from time to time
D2006 vanishes from my task bar - I can still get to it via alt+tab,
but it's just bizarre.
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--
Rohit Gupta
B.E. Elec. M.E. Mem IEEE Associate IEE
Technical Manager
Computer Fanatics Limited
Tel +64 9 4892280
Fax +64 9 4892290
Email [EMAIL PROTECTED]
Web www.cfl.co.nz
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