I have created a VB .NET command Line application, to call a Active X Dll. This displays a non-modal form. I run this application via installshield to execute on installation of the software. However I get the following error:

Making any modification to the VB6 code is not an option, so is there a way of calling non-modal forms from a VB .Net application.
This post may answer some questions. From my understanding you aren’t able to show a non-modal form from an ActiveX DLL, the two options are to either modify the DLL to show a modal form or to recompile it as an executable.
Non-modal forms cannot be displayed in this host application from an ActiveX DLL, ActiveX Control, or Property Page
The post mostly just links to this KB article http://support.microsoft.com/kb/176468