Combo boxes for data entry

Dear all ,
I very new to access ..hope u will help me ….
I have created database of transactions ….each transaction is belong to some person who is member of certain group …so I have made reference table for that combination and given combination ID ….
Id person groups
1 A AA
2 B BB
3 A BB
4 B AA

so the id that is number is mention in transaction table…
Date ID Transaction
5th may 1 456
6th may 1 464
5th may 2 67

for data entry I want to create an form with dependant cascading combo boxes of person and group and I want that every transaction should pick up ID based on those combinations ..
please help me to solve this

Hi,
Not sure if I quite understand what you are trying to do... Are you trying to populate records based on the person and group selected from combo boxes?
If all the info is contained in the one table then you should be able to use the bound property of the combo box which will grab all records for the value selected in the combo. If you need to select both combos to ensure you get a single record then I would use a DLookup statement to grab the records based on the two combo boxes.