Application server F4 Help

Hi,

i am using this FM F4_DXFILENAME_TOPRECURSION to pick files from applicaton server, But i want to select only the folder name (not the file name). Is there any function module/Class to do this functionality. I have also tried function module /SAPDMC/LSM_F4_SERVER_FILE, But it is not statisfied the requirement.

Regards

Krishna