In some cases, an application hosting a migrated ActiveX control throws an exception with the following error message:

        ActiveX control is windowless. Windowless ActiveX controls aren’t supported

The cause for this error is the Data Execution Prevention (DEP) feature introduced in Windows Vista and Windows 7, as explained by this Microsoft KB article:

  http://support.microsoft.com/kb/875352/en-us

Basically, there are two workarounds for this issue:

1. Disable DEP on the computer (not recommended). This can be achieved by running the following command:

           bcdedit /set nx AlwaysOff.

2. Use the EditBin.exe tool (installed with Visual Studio, when you install Visual C++) to mark the application executable file as “application not requiring DEP”. This is the command you can specify as a post-build step:

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

   However, please notice that the command doesn’t work when preparing a setup procedure (for ClickOnce or other), because in this case the executable included in the setup file is not the the file in the bin\Release foldere; instead, it is the file in the obj\Release folder, therefore the exact command is

   call "$(DevEnvDir)..\tools\vsvars32.bat"
   
   editbin.exe /NXCOMPAT:NO $(ProjectDir)obj\$(ConfigurationName)\$(TargetFileName)