Hi Krish,
Please refer to the link below:
Dynamic population of F4 help in Webdynpro ABAP based on user's selection
More info on the links below:
F4 help functionality for a dynpro screen field using the PROCESS ON VALUE-REQUEST statement
Input Help - Developing Web Dynpro ABAP Applications - SAP Library
Regards,
Ashvin
Message was edited by: Ashvin Sungkur