windows user name in webdynpro ABAP/BSP

Dear Gurus

" Do not Treat this as Duplicate therad

I need to display windows user in my webdynpro application,

i have tried method cl_gui_frontend_services=>get_user_name, But since we are using this in browser this is not giving NULL

I been through many posts kindly guide in resolving this Issue

I have been through the following threads

function-like-getusername-in-bsp-

Get Windows User in ABAP - Webservice

(In the above link Adam suggested some code but i dont know how to implement it as it is giving error)

windows-user-name-in-webdynpro-abap

clguifrontendservices-is-return-null

/people/koen.labie2/blog/2006/11/29/eating-cookies-with-webdynpro-and-bsp

Kindly Guide me to resolve this Issue either through BSP or through Webdynpro for ABAP

Thanks and Warm Regards

Ramchander Rao.K