Problem writing to windows event log

Question

0.00/5 (No votes)

See more:

I wrote an ISAPI Extension for IIS in standard C. I would like to be able to record error messages to the system event log but when I call RegisterEventSource, it returns 5 - Access Denied.

What I have tried:

The value passed to RegisterEventSource for sourcename is valid. I have another program which is a Windows Service that is registered with EventLog and works great. I am passing the name it uses and I am trying to use one of it's messages. If I can get it to work from the ISAPI Extension, I can add the messages to it.

Posted 5-Dec-19 8:38am

Roland M Smith

Updated 5-Dec-19 9:01am

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Accepted Answer · 2019-12-05T08:45:00

Solution 1

Event sources can only be registered from an elevated application. ISAPI extensions don't - and shouldn't - run elevated.

You'll need to create the source as part of the installation.

Posted 5-Dec-19 8:45am

Richard Deeming

Comments

Roland M Smith 5-Dec-19 19:48pm

I said right in the 'What I have tried' that I already created the source.

Richard Deeming 6-Dec-19 6:39am

Either the user your ISAPI extension is running as doesn't have read permissions to one of the keys in the HKLM\SYSTEM\CCS\Services\EventLog tree, or the source you're trying to register doesn't match the source you've already registered.

Roland M Smith 7-Dec-19 20:48pm

I'll try giving IUSR read permissions to the registry key. Thanks.