?
Solved

RAS not loading admin DLL

Posted on 1997-07-02
6
Medium Priority
?
279 Views
Last Modified: 2013-12-03
I have coded a RAS Admin DLL that exports only the function RasAdminGetIpAddressForUser(), but I can't seem to get RAS to start when the registry keys are added.  The registry keys are written as per instructions at http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f69_19.htm, as follows:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RAS\AdminDll]
"DisplayName"="Trial IP DLL"
"DLLPath"="D:\\usermgr\\IPByPort.dll"

I've built the DLL (no errors, no warnings) using VC++5, and written a .DEF file that's included in the project as follows:

LIBRARY    IPByPort
DESCRIPTION "Assigns a fixed IP address by COM Port number"
EXPORTS
   RasAdminGetIpAddressForUser

So the question is - I'm fairly new to DLL programming, so this may well be simple - why doesn't RAS load it?  The error in the event log is event ID 20104, data 7f 00 00 00.
0
Comment
Question by:robinhood
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 

Author Comment

by:robinhood
ID: 1399952
Edited text of question
0
 
LVL 5

Expert Comment

by:y96andha
ID: 1399953
You might need to create all functions. Try adding the rest of them as empty stubs.
0
 
LVL 15

Expert Comment

by:NickRepin
ID: 1399954
Make sure your callback functions entries are declared with WINAPI, CALLBACK, APIENTRY or _stdcall modifiers.

Change your code and Rassapi.h to use the following function declarations:

DWORD APIENTRY RasAdminGetIpAddressForUser(
   ....);

Or, download the latest version of rassapi.h from http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/headers/_winnt/c382_19.htm.

Also, there is the sample on the microsoft's sites which demonstrates the creation of a user's dll for RAS server. But I don't remember  exactly where it resides. But I have got a copy of it and I can send you if you want.

P.S. I'm unavailable to read a mail every day this month, so it's may be a delay with my answer.

0
Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

 

Author Comment

by:robinhood
ID: 1399955
I've got the new rassapi.h already (came with VC++5) - at least, it has the correct (APIENTRY) definitions for the DLL functions. I've also found *a* (if not *the*) sample on MS's site, including both .exe and .dll code for RASSAPI functions.  Needless to say, neither of them even come close to compiling, but that's okay - I've checked the general coding structure that they've used, and it all seems to be the same as what I was trying.

The comment from y96andha might be the trick I'm looking for, and is the one difference between my project and that of the MS sample (except that mine builds :) - I'll give it a go and follow up here with how it works out.
0
 

Author Comment

by:robinhood
ID: 1399956
The comment from y97andha is in fact the correct solution.

Sorry about the "F", Nick - ExEx haven't got their act together yet to enable the "Mark a comment as an answer...", so it wasn't that your answer was wrong, it just wasn't the solution to the problem.
0
 
LVL 5

Accepted Solution

by:
y96andha earned 420 total points
ID: 1399957
I think Microsoft could have done better on the error message, to show what was really wrong. I read through the docs, and noted that there was nothing about what functions had to be implemented, and then that there would be a message in the event log if any function couldn't be loaded.
0

Featured Post

Veeam Disaster Recovery in Microsoft Azure

Veeam PN for Microsoft Azure is a FREE solution designed to simplify and automate the setup of a DR site in Microsoft Azure using lightweight software-defined networking. It reduces the complexity of VPN deployments and is designed for businesses of ALL sizes.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article describes how to programmatically preset the "Pages per Sheet" option that's available with most printer drivers.   This setting lets you do "n-Up" printing, where two, four, or more pages are printed on each sheet of paper. If your …
zlib is a free compression library (a DLL) on which the popular gzip utility is built.  In this article, we'll see how to use the zlib functions to compress and decompress data in memory; that is, without needing to use a temporary file.  We'll be c…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question