Good morning, Craig, and Welcome to Microsoft Newsgroup Support Service! My
name is Jialiang Ge (MSFT) and will work with you in this issue.

PROBLEM DESCRIPTION

We need to create a WinForm application using VS2008 that uses MapPoint
2006 control. This MapPoint 2006 control for MapPoint 2006 doesn't display
in Visual Studio 2008 designer window, and gives the error "Cross-thread
operation not valid: Control 'axMapper' accessed from a thread other than
the thread it was created on." This is happening on Vista Machine.

SUMMARY OF MY TROUBLESHOOTING

The issue which we are facing is due to Data Execution Prevention (DEP).
The MapPoint ActiveX control uses ATL 7.0 and there are known problems with
ATL 7.0 and DEP which are listed in the following article. This article
also contains the various resolution steps which you can try.

Applications Using Older ATL Components May Experience Conflicts With DEP
http://support.microsoft.com/?id=948468

Unfortunately, there will be no fix/change for the MapPoint 2006 ActiveX
control. MapPoint development is aware of the problem and will work to see
that the new version of the control which will work in Visual Studio 2008.

WORKARDOUNDS

Put the code below in Form_Load:
           this.axMappointControl1.Location = new Point(10, 10);
           this.axMappointControl1.Name = "MPC";
           this.axMappointControl1.Size = new Size(100, 100);
           this.axMappointControl1.OpenMap("d:\\North America.ptm");

Use the following code in the post build event, this will create the
executable without NXCOMPAT.

call "$(DevEnvDir)..\tools\vsvars32.bat"
editbin.exe /NXCOMPAT:NO "$(TargetPath)"

This workaround works well on my side. Please try it and let me know the
result.

Regarding non-visibility issue at design time, a mappoint developer told me
we can execute "bcdedit /set nx AlwaysOff" from an Administrative command
prompt. But based on the test in my machine, this does not work. Because
the mappoint team has already confirmed this is an Microsoft Product issue,
all the support incidents regarding the issue from Microsoft CSS will be
free of charge.

Let me know if you have any other concerns or questions, I will spare no
efforts to help you.

Regards,
Jialiang Ge (jialge@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
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msdnmg@microsoft.com.

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