filters on serach helps on selection screen

Hi,

In my report I have 5 fileds on selection screen. I have given search helps for 5 fields using

at selection-screen on value request for s_field1.

CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'.

2nd field search help values are dependent on 1st fields value,

3rd field search help values are dependent on 1st and 2nd fields and so on..

all fields are select-options with no intervals.

how to do it?

how to read values (multiple)of 1st field from screen

when user clicks f4 help on 2nd field.

Thanks in Advance....