If this variable is set to True, the WBSP engine will process WBSP files that upload files to server. To learn more about this, please read the explanation for usage of WB_AllowMultipart variable in section FormFields and explanation for Upload section of WBSP file. WBSP enables author to control the type, size and location of uploaded files. However, server administrator can disable file-uploading by setting this variable off, even when author of the site has created proper WBSP files. Default value is Off.