Capturing the date/time value into variables

Hi,

I am trying to pick up the system time and date into a variable as follows.

DATA: v_uzeit type sy-uzeit.

v_uzeit = sy-uzeit.

I have written this code in a function module and in debug mode I am not able to get the system time in the variable.

Please provide pointers.

Thanks in advance,

Regards,

Amit Deshpande