Question Join/Subselect

Hi,

I have some problems with creating a query that will replace values in
one table from another one.

Table 1:
userName : refCode1 : refCode2
------------------------------
alex : 12 : 24

Table 2:
refCode : ActualCode
---------------------
12 AAAAAA
24 BBBBBB

Result Desired
userName : refCode1 : refCode2
------------------------------
alex : AAAAAA : BBBBBB

I need to crete a view that returns me Table1 but replaces refCode1,
refCode2 with the ActualCode.

I did not have any success with Joins or Subselects so far.

Thanks for any advise

Alex