I made custom field type using fckeditor web editor . To create custom column on document library ,shows error “Earlier versions of client programs migh not support this type of column. Adding this column might block those programs from saving documents to this library”
Hi, that message is expected. “Client programs” here means other programs that interface with SharePoint, e.g. Office applications. When you use MS Word to edit a document in SharePoint for example, the columns of the document library will be displayed in Word, and you can edit those columns straight in Word. If the type of your column is unknown to Word, then you will not be able to edit that column in Word. And if you made this column mandatory, then you might not be able to save the document from Word into SharePoint.
