Hi everyone!
I know that this question is rising over and over again but I couldn’t find
the answer in archives. So I apologize and would like to ask again:
How can I make my service (written using ATL) GUI-enabled so I can display
messages directly from the service?
TIA,
Vladimir
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OOT: Message box in a serviceHello, Vladimir.
By default Win32 services associated with non-visible windows station (for services which run in the local system account it is Service-0x0-3e7$) and they can’t (without using special flag MB_SERVICE_NOTIFICATION or MB_DEFAULT_DESKTOP_ONLY in the MessageBox function) interact with user. However, you may configure a service to have GUI capabilities. Just set Type field of the registry service entry equal SERVICE_INTERACTIVE_PROCESS. When this key is specified SCM will connect the service with WinSta0 instead Service-0x0-3e7$ and it will alow to display windows and dialog boxes.
Regards, Vadim.
----- Original Message -----
From: Chtchetkine, Vladimir
To: File Systems Developers
Sent: Tuesday, May 15, 2001 9:35 PM
Subject: [ntfsd] OOT: Message box in a service
Hi everyone!
I know that this question is rising over and over again but I couldn’t find the answer in archives. So I apologize and would like to ask again:
How can I make my service (written using ATL) GUI-enabled so I can display messages directly from the service?
TIA,
Vladimir
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There is a special CONSTANT for MessageBox API. CHeck the Win32 SDK
Help.
You may also want to check the ms kernel-mode NG, as the question
was also posted there.
Regards, Dejan.
“Chtchetkine, Vladimir” wrote:
Hi everyone!
I know that this question is rising over and over again but I couldn’t
find the answer in archives. So I apologize and would like to ask
again:How can I make my service (written using ATL) GUI-enabled so I can
display messages directly from the service?TIA,
Vladimir
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–
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www.register.co.yu
E-mail : xxxxx@ptt.yu, xxxxx@register.co.yu and
xxxxx@alfaunits.co.yu
ICQ# : 56570367
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developers.
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actually the service has to interact with the user’s windows
station(“WinSta0”) and desktop (“Default”). If the service account is other
than local system, first must impersonate the user. For example if there is
a RPC request from a user application, you can do like this:
-GetDesktopWindow
-GetProcessWindowStation
-GetCurrentThreadId
-GetThreadDesktop
-RpcImpersonateClient
-OpenWindowStation
-SetProcessWindowStation
-OpenDesktop
-RpcRevertToSelf
-SetThreadDesktop
-MessageBox
-SetThreadDesktop
-SetProcessWindowStation
-CloseDesktop
-CloseWindowStation
You can get a better explanation from MSDN.
Zsolt
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You can also set the flag in the service registry entry indicating that you
would like the service to interact with the desktop (WinSta0).
There are some drawbacks; too many for me to go into right now. The general
design practice is to develop an application that is tied to the service.
The service and application can then communicate and the application can
handle displaying any user messages or dialogs.
It is important to separate the concept of services from applications. It is
also advisable to NOT use MFC in your service; this too can lead to
unexpected issues and problems.
Just my .02
Jamey
Kernel driver developer; not user developer.
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of xxxxx@xtra.co.nz
Sent: Tuesday, May 15, 2001 9:17 PM
To: File Systems Developers
Subject: [ntfsd] Re: OOT: Message box in a serviceactually the service has to interact with the user’s windows
station(“WinSta0”) and desktop (“Default”). If the service
account is other
than local system, first must impersonate the user. For example
if there is
a RPC request from a user application, you can do like this:
-GetDesktopWindow
-GetProcessWindowStation
-GetCurrentThreadId
-GetThreadDesktop
-RpcImpersonateClient
-OpenWindowStation
-SetProcessWindowStation
-OpenDesktop
-RpcRevertToSelf
-SetThreadDesktop
-MessageBox
-SetThreadDesktop
-SetProcessWindowStation
-CloseDesktop
-CloseWindowStationYou can get a better explanation from MSDN.
Zsolt
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