failed to load dll

mc 3,906

but when I register it .and

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Lex Li (Microsoft) 4,987 Reputation points Microsoft Employee

2024-06-17T04:11:00.0766667+00:00

Where did you put the compiled .dll file? Which elements did you add to IIS configuration (applicationHost.config)?
mc 3,906 Reputation points

2024-06-17T07:07:37.1866667+00:00
I put it to desktop folder. and register it to IIS.

this is the change in applicationHost.config not changed myself I just run one command to add the Module to IIS

<add name="MyHttpModule" image="C:\Users\angellaYu\source\repos\IISModule\x64\Debug\IISModule.dll" preCondition="bitness64" />

this is CMyHttpModule

CMyHttpModuleFactory

in dllmain.cpp

I think the RegisterModule not be called.
Sam Wu-MSFT 7,131 Reputation points Microsoft Vendor

2024-06-17T07:25:58.05+00:00

@mc

You need more information to analyze your problem, do you get any error messages when the AppPool stopped? You can check if there are any related error messages in Event Viewer.
mc 3,906 Reputation points

2024-06-17T13:11:20.25+00:00

Application: IIS-W3SVC-WP : `Module IISModule.dll can not be loaded return value is error message.

System
mc 3,906 Reputation points

2024-06-18T08:28:12.7733333+00:00

what about error :0x8007007e?
Lex Li (Microsoft) 4,987 Reputation points Microsoft Employee

2024-06-18T21:11:24.3366667+00:00

0x8007007e means module not found. That usually indicates after your recent changes to IIS (or IIS Express) the process cannot load your module (or its dependencies) properly. This might be caused by wrong path, or WOW64 redirection. You might use a tool like Process Monitor to look deeper.

As the entire development and troubleshooting around an IIS module can be exhausting, I don't personally believe you can get all the help over a forum like this. If possible, please open a support case via https://support.microsoft.com to learn more, or hire an experienced IIS professional consultant.

Accepted answer

Lex Li (Microsoft) 4,987 Reputation points Microsoft Employee

2024-06-17T20:59:15.12+00:00
0x80070005 is expected as you are forcing IIS (a Windows service app) to load the files from your personal folder (C:\Users\angellaYu\source\repos, which usually has access restrictions). What I recommend is that,

To just test/debug your IIS module, learn and use IIS Express which runs under your own account. The challenging part to you is how to better incorporate IIS Express executable and config file to your workflow, but this is doable.

Once you get everything work as expected, create a proper installer for IIS, and install the module to a more suitable location (eithe Program Files or system32).

It's relatively difficult to find simple examples here, as most of IIS extensions/modules are not open sourced, but ASP.NET Core module and HttpPlatformHandler v2 are both available on GitHub, https://github.com/dotnet/AspNetCore and https://github.com/lextudio/httpplatformhandlerv2
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mc 3,906 Reputation points

2024-06-18T08:28:32.8166667+00:00

what about error :0x8007007e?

mc 3,906 Reputation points

2024-06-18T08:59:28.0266667+00:00

I will start another thread with another question. please help me.
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