Question

Install WMI Server + MOF File

Asked by: ammotroop

All,

I am wondering if someone could possibly provide a link or show me steps to take in order to get a WMI Service (i.e. Win32_Processor) to talk with a dll file.  My current goal is to create an application and certain features I want the user to be able to create WMI Providers like the above and link them to .dll files.  If I run mofcomp name.mof how do I go about telling that goes with myName.dll or .lib?  I hope I explained this good enough for someone to help I just can't really find any concrete answers.

Thanks,
Jason

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Asked On
2006-08-02 at 23:45:53ID21941667
Tags

provider

,

wmi

Topics

Miscellaneous Programming

,

Installation

,

VB Script

Participating Experts
1
Points
500
Comments
6

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Answers

 

by: grayePosted on 2006-08-03 at 08:48:05ID: 17242730

Is your DLL going to be a "consumer" of an existing WMI class?   For example is it going to be pulling information from the Win32_Processor class?

...or is your DLL going to be a "provider" where you'd be creating a new WMI class (not one of the standard WMI classes)

99.44% of the time, an application (either an EXE or a DLL) would be just consuming a WMI class.  This wouldn't require you to do compile a MOF file or any of that.   Instead you'd just use the .Net Frameworks System.Management classes to interact with WMI.

 

by: ammotroopPosted on 2006-08-03 at 15:09:26ID: 17245901

graye,

Thanks for the response.  The mof file is inserting a new WMI Class which has its own methods and properties.  I will not be using a pre-existing class and this will become it's own provider.  I am using the Management classes to interact and have no problems with that.  Here is an example of what I have done.

- used mofcomp to compile mof file
- user regsvr32 to register dll file

Are there any steps that I need to take in order to get this to work.  Once I compile the MOF I can connect to that class, but when I execute the method it tells me that the "Provider load failure" error.  I then run regsvr32 and sometimes I get the provider error and sometimes I get "Provider is not capable of this operation" or something of that nature, don't remeber the exact error off the top of my head.  From my understanding this is all that I should have to do unless I am missing a step.

Thanks for the help.

Jason

 

by: grayePosted on 2006-08-03 at 16:20:45ID: 17246391

Well, it's hard to diagnose the problem without seeing the source code for the provider...   Athough the Dot Net Framework has just recently added support for writing providers, I still find it easier to write a provider in C++.

The "bible" for writing WMI providers is "Developing WMI Solutions" by Graig Tunstall and Gwyn Cole (ISBN 0-201-61613-0)

 

by: ammotroopPosted on 2006-08-03 at 18:45:04ID: 17247003

Yeah, I know what you mean, but unfortunately the source code is kind of "confidential" I guess is the term to use.  Not that I wouldn't love posting it here, but I have signed an NDA for it so, you know.

I will check out that book and see if it gives me any options.  And I wish I could program in C++ enough to write my own provider but I can't.  Only C# and VB.

I will check into writing a provider in C#.

Thanks again for the help and I will keep trying different things.

Jason

20120131-EE-VQP-002

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