I have Mappoint 2004, and had a nice app working with VB.NET 2003

I have just installed VS 2005.
Registering the mappoint control was slightly different from how it was in 2003, but it appeared in the toolbox seemingly correctly.

I create a main form, with nothing else on. It runs OK.

I add a mappoint control from the toolbox. No code, just the control.
I press F5 to run, and the error produced is:
An error occurred creating the form. See Exception.InnerException for details. The error is: ActiveX control '8f78d7fc-bae4-46a4-a79a-052356ab3dd4' cannot be instantiated because the current thread is not in a single-threaded apartment.

I can't get past this first very basic hurdle. Any ideas?

James

I have a similar error @ my 64 bit machine. and work fine my 32 bit.
Hope this help.
John

For me, both projects are on the same machine, a Dell Latitude.
Have you resolved your problem? - James

I've found a post:
http://support.microsoft.com/default...en-us%3B841295
which seems to address the problem.

I can't find any reference to 'thread' nor 'MTA' in my code nor in the hidden generated code.

Has anyone got activeX control to work in VS2005?

Hi,

Yep, works fine here. VS2005 and dotNet 2.

But what I can understeand from this message is that it complains because it is called in a thread context. You cannot call any GUI in another thread than mainthread. Or do I misundersteand the mesage ?

I have a confession. I actually did not start from a clean project. I deleted all the forms in my VB2003 project and then converted to VS2005. By the time I'd spoted the error, I think I'd forgotten. It's interesting that after the initial panic and relaxing over the weekend, I wrote out another request for assistance, and this time read it over checking the truth of every sentence I'd written, and then it hit me. So I actually created a new project and it works fine.
Apologies and thanks to anyone who's put in effort due to this.
-James

I have a confession. I actually did not start from a clean project. I deleted all the forms in my VB2003 project and then converted to VS2005. By the time I'd spoted the error, I think I'd forgotten. It's interesting that after the initial panic and relaxing over the weekend, I wrote out another request for assistance, and this time read it over checking the truth of every sentence I'd written, and then it hit me. So I actually created a new project and it works fine.
Apologies and thanks to anyone who's put in effort due to this.
-James

I have encountered the same error after converting VS2003 VB Winform control to VS2005 which has a MapPoint control embedded in it.
My app contains a Windows.Forms.UserControl class with MapPoint control embedded on it and a test form I use to develop and debug the UserControl. I tried tagging the Sub Main with <STA...> attribute as per MSDN article with no success.

When I embed the usercontrol in my ASPX page it just crashes the page.

This usercontrol is intended to be accessed embedded in an ASP.NET page via IE7.

I'm stuck. Do I need to dump MapPoint?