.NET Windows Forms applications use Resx files to store metadata with each form. Resx files contain designer metadata as well as graphics (i.e., bitmaps, icons). These files also contain Legacy ActiveX control property settings and binary information needed for Interoped controls (i.e., OCXState).
You will need Resx files in order to maintain your user interface components with the .NET designer and to display .NET user interfaces at run time.
Select [Tools/Author Resx Files] to create Resx files for your migration project.
This option will create a cache of resx files for each migration unit in the migration project. The Resx content in these files will be included in your target projects as needed if you include the Resx attribute with the compile command in your translation script:
<Compile Project="%SrcPath%" Resx="%ResxFolder%">
See the FileExplorer sample for an example.