The edited resources are written into several files:
The header file where the #defines of the symbolic names are written that is included in your source code to name objects symbolically.
The binary resource file that can be used by the linker to bind the resource into the executable.
You can also generate an ASCII rc file that can be later compiled to a binary resoure file.
You may wish to generate a .dlg file with just the dialog box definitions and not any other resources.
You can configure this options using the menu "Design", then "Output".