Regarding GUI_UPLOAD/GUI_DOWNLOAD

Hi Experts,

I have created a program with gui_upload and download function. its working. But in this program I have to create a log file where I have to maintain the information like how much data is uploaded and downloaded and if some records are not uploaded then why and which are these records. In short I have to create a log file with number of lines inserted , failed, reason for fail etc.

Can anybody help me that how I can do this?

Thanks in advance