>>>The RowSourceType is 2-Alias, RowSource contains 2 columns of parent table
>>>and controlSource is the field of child table. There is another detail,
>>>in the databases I defined insert rule for child table (referential integrity) like RESTRICT
>>
>> No, if RowSourceType=2 you cannot use '2 columns' as RowSource. What you can do is to make RowSource="parentalias" and ColumnCount=2. It could be the reason. Also, I don't like (personally) to fill ControlSource property.
>
>Maybe I have a wrong concept about combobox.
>
>I will try explain with a example what I am trying to do.
>
>If I have Departament table as parent table and I have Employee as
>Child table. In the form of Employee I am trying to include a combobox
>with description of Departament table and I want to record in the employee
>table de code of departament. So, the user will choose de departament of
>the employee selecting it in the combobox of Departament.

Set Combo properties in Property Sheet:
RowSourceType=6
Row.Source=Dept.Code,Name
ColumnCount=2
BoundColumn=1
Now Combo.Value property will contain Dept.Code which you can use for employee record.