Exporting Data to the Package
You can develop a custom resource in such a way that it can place arbitrary data, in the form of one or more files, in a site package and have those files unpacked on a different computer. In order for this arbitrary set of files to be placed in a site package, a custom resource must include a Component Object Model (COM) object that implements the Export method of the IPuP interface. Commerce Server Site Packager calls this method, providing the name of a temporary file or folder where the custom resource must place the file(s) to be packaged. Once the Export method returns, Commerce Server Site Packager will add the file (or files) to the package.
The ProgID of the object that implements the IPuP interface must be placed into the s_ProgidSnapIn column of the SystemProps table in the Administration database (the ProgID is also added to the s_ProgIDSnapIn column of the Resources table when the SiteConfig object is used to migrate configuration values). When the Commerce Server Site Packager encounters this ProgID in the course of packaging the site, it will instantiate the corresponding object and call the Export method of its IPuP interface.
For more information about the Export method, see IPuP::Export.