Hi,
You can display word document and edit and save them using Office control UI. Check this wiki for reference: http://wiki.scn.sap.com/wiki/display/WDABAP/Microsoft+Excel+using+the+office+integration+in+WebDynpro+ABAP
Also this SAP Help: http://help.sap.com/saphelp_nw70ehp1/helpdata/en/d1/af8841349e1909e10000000a155106/content.htm
Regards,
Kiran