Solved

CoCreateInstance - Class not registered

Posted on 2006-11-09
7
1,655 Views
Last Modified: 2007-11-27
Hello-

Having problems with CoCreateInstance:

Here is the call I'm making:
CComPtr<_ComTestData> comTest;
hr = CoCreateInstance(__uuidof(_ComTestData), NULL, CLSCTX_SERVER, IID__ComTestData, (void**)&comTest);

After the CoCreateInstance, hr = 0x80040154, aka Class not registered.  This class is contained in an activex control, which I've imported in stdafx.h via:

#import "C:\PathToMy\ActiveXControl.ocx" named_guids

I've checked the registry via regedit, and the class appears in the registry and to be sure I have unregistered and reregistered the control several times with regsvr32.

Any suggestions on this?  I'm at my whits end.
thanks!
0
Comment
Question by:PhilC
  • 4
  • 3
7 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 17909648
Have you also tried

hr = CoCreateInstance(CLSID_ComTestData, NULL, CLSCTX_SERVER, IID__ComTestData, (void**)&comTest);

?
0
 

Author Comment

by:PhilC
ID: 17909684
Yes.  I've tried every iteration of everything I can think of and nothing works.
0
 
LVL 86

Accepted Solution

by:
jkr earned 500 total points
ID: 17909816
Then I'd try 'RegMon' (http://www.microsoft.com/technet/sysinternals/ProcessesAndThreads/Regmon.mspx) and check what data in the registry is actually being accessed and find what's going wrong.
0
Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

 

Author Comment

by:PhilC
ID: 17913931
Ah.  Nice tool.  I'll give it a try, thanks.
0
 

Author Comment

by:PhilC
ID: 17938407
Ok, got side tracked off this for a couple days-

What I found is that the InprocServer32 value for this ComTestData object is non-existant.  I tried adding it, based on other objects that work fine from the same control, and its giving me a class factory cannot provide requested class.

I suspect something was/is wrong with this control, would that be a reasonable assumption?
0
 

Author Comment

by:PhilC
ID: 17939310
Never mind, I was doing something very very wrong.  Thanks for the help though, that tool was very useful.
0
 
LVL 86

Expert Comment

by:jkr
ID: 17939809
You're most welcome ;o)
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

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

Suggested Solutions

When writing generic code, using template meta-programming techniques, it is sometimes useful to know if a type is convertible to another type. A good example of when this might be is if you are writing diagnostic instrumentation for code to generat…
C++ Properties One feature missing from standard C++ that you will find in many other Object Oriented Programming languages is something called a Property (http://www.experts-exchange.com/Programming/Languages/CPP/A_3912-Object-Properties-in-C.ht…
The goal of the video will be to teach the user the difference and consequence of passing data by value vs passing data by reference in C++. An example of passing data by value as well as an example of passing data by reference will be be given. Bot…
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

775 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