BW SEM-BPS API functions from a Web Dynpro project in Netweaver

Hi,

Rather than using the standard Web Interface Builder in BW SEM-BPS (3.1B), we have to use SAP Netweaver to create a Web Dynpro project which accesses all the API_SEMBPS functions, such as GETDATA, SETDATA, FUNCTION_EXECUTE etc. Has anyone done this before? If so, do you have any examples, hints?

Regards,

Linda Lee