How To Capture The Duration Of Bcp Process Into A Variable

Hi, I am interested to know how I can capture the amount of time bcp takes in a table.... the whole idea is to keep track of all bcp activities and create atable to keep bcp log time to the following table:
create table bcp_log(table_name char(20),row_count int,time_in datetime)

what I thought is to create a trigger on each table I want to log its bcp. then declare a variable and assign the duration of bcp .. But I did not know where to pull that value..... Dose anyone knows how to capture the duration of bcp for a table....