Here is a slick workaround that allows users to attach multiple files to a Domino document using the browser's File Upload Control. If the user indicates they want to attach another file, the document saves and re-opens in edit mode so that another file can be attached.
To incorporate this functionality in your form, perform the following steps:
1. Create an editable keywords field below the Upload Control and call it "AttachAnother". The choices for this field should be "Yes" and "No". Verify that the interface for this field is set to "Radio Button".
2. Create a computed for display field called "$$Return". Enter the following formula for it's value:
db := @Subset(@DbName;-1);
attachdoc := "[/" + db + "/(UniqueDocID)/" + @Text(@DocumentUniqueID) + "?editdocument]";
success := "Document has been saved.";
@If(AttachAnother = "Yes"; attachdoc; @Return(success))
3. Create a hidden view, called "(UniqueDocID)". The view selection formula should be "SELECT @All". The view only needs to contain one column, sorted in ascending order, with the following column formula: