I've added a reference to the VisioExport.dll to my project, added the VisioExport.vxt to my [application]\bin directory, and called the following code:

Dim exporter As New MindFusion.Diagramming.Export.VisioExporter
exporter.ExportVDX(FlowChart, "c:\temp\test\test.vdx")

There doesn't appear to be any errors, but no visio file is created. How can I tell why it is not writing the file, or under what circumstances would the export fail?

Thanks for the input. In my project, I had a filesave dialog for the user to input the desired filename and directory. If the user chose to save in the 'c:\test' directory, an error would be shown in the console output complaining about not being able to find the VisioExporter template in the 'c:\test' directory. I changed the dialog property 'RestoreDirectory' to true and this rectified the problem. I'll have to make sure that I'm careful in tracking the current direct directory elsewhere in the project however.