i have developed a WebDynpro application using ABAP webservices, now i want achieve sso,
can any body suggest me how to do that. and some material on that.
You can achieve this by creating HTTP Destination for the WebService and refer it in your program.
1) Create a HTTP Destination for your Web Service.
2) Set Destination name before calling the Web Service.
Refer the following link to know how to use HTTP Destination service from WebDynpro.
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/59/e8e95d1eba48dfa86ae91ad8816f5d/content.htm">HTTP Destination with WebDynpro</a>