Contensive supports a convenient way to create and process HTML input forms. See the HTML Form Handling section of the Contensive API and ccDemo site for details on the methods.
Contensive forms support most HTML form element types, including File upload. These elements may be intermixed with no special requirements, except for requiring the GetUploadFormStart and GetUploadFormEnd if a File upload input object is used.
Form processing using the QueryString name "RequestBinary" as a signal to process forms as FileUpload, so this name is reserved, as well as the "RB" abbreviation.