Concatenate Multiple Records Into One Field

Someone please help!. I am trying to create a view in SQL Server 2000 to use for a report but I am having problems with concatenating multiple values into one field. In my example below I am trying to list all records in my queried table in columnA then concatenate a list of all other records that share the same value in column B of the queried table into another field. If there are no other matches for a row in columnA then I would leave the corresponding field in columnB blank. Thanks in advance.

TABLE
ColumnA ColumnB
1......A
2......B
3......C
4......A
5......A
6......B
7......C
8......D
9......C
10.....E

EXPECTED OUTPUT
ColumnA ColumnB
1......4,5
2......6
3......7
4......1,5
5......1, 4
6......2
7......3
8......
9......3,7
10.....create function ConcatFld (@.RowId int, @.RowVal char(1))
returns varchar(100) AS
begin
declare @.Ret varchar(100)
set @.Ret=''
select @.Ret= @.Ret + cast(ColA as varchar)+',' from Tbl1 where ColB=@.RowVal and ColA<>@.RowId
if len(@.Ret) > 0
set @.Ret = left(@.Ret,len(@.Ret)-1)
return @.Ret
end
--------

select ColA, dbo.ConcatFld(ColA,ColB) from Tbl1|||Thanks Upalsen, this is exactly what I need!!!