We help IT Professionals succeed at work.

Service notification for logon?

dmetzler
dmetzler asked
on
Medium Priority
376 Views
Last Modified: 2013-12-03
I have a Win32 app running as a service in Win95/NT.  I would like my application to be notified when a user logs on the workstation.  How can I do this?
Comment
Watch Question

Commented:
Unlock this solution and get a sample of our free trial.
(No credit card required)
UNLOCK SOLUTION

Author

Commented:
Thanks.  I can now determine a logon/logoff change, but how do I know what state the program is in at any time?

If the process is started as a service before logon and I get a WM_USERCHANGED message, I know I am logged in.  If a user logs off (ie program is started via command-line) I know the user is logged off.  But how do I know what state the program is in when it starts?

Thanks,

Don

Commented:
Thank you for the nice grade!

Not sure I understand enough about your service to answer the question.  Please check out the following & provide as much info as possible:

1)Is the service a regular application that can also be installed as a service with the help of another program(eg, SRVANY.exe)?  If so, a call to WNetGetUser() should either fail if run as a service (or if it somehow succeeds will return the user name as "SYSTEM"), or succeed (with user name other than "SYSTEM") when started (run) via command line.

2) Is it a pure service and by "started via command-line", you mean it is installed as a service (manual) and then started with SC.exe or Net.exe (or Control Panel) or some other similar service controller?  If this is the case, is it SERVICE_SYSTEM_START or SERVICE_AUTO_START, vs. SERVICE_DEMAND_START?  If Demand_start, you could make it Auto_start and always be keeping track of wm_userchanged, even when it is reporting that it is paused or stopped.


Author

Commented:
It can be run as a service (by entering a service entry in the registry) or it can be run after logged in.

In the latter, a user can log off and still have the application running - this currently works.

It sounds like using WNetGetUser() will let me determine what state the workstation is in.  Does this work in 95/98/NT (or require dynamic linking)?

Thanks,

Don

Commented:
WNetGetUser() doc says NT 3.1 or later, and Windows 95 or later.
It is declared in winnetwk.h and requires linking with mpr.lib, no dll's are mentioned.

Good luck,

Bob
Unlock the solution to this question.
Thanks for using Experts Exchange.

Please provide your email to receive a sample view!

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.