>>>Your code gives me an error alias crsTest in not found on NewObject line.
>>>
>>>Anyway, I believe you it doesn't work. Can you try with different rowsource types? Does it mean it never worked as we assumed it should work or it's a problem with SP? Does it mean what we can not have NULL as Combo's values? At least when we're using array as its rowsourcetype? And if Yes, what workaround should I try to implement, that would not require lots of re-writes? We may try to use alias as rowsourcetype but it would mean we need to generate unique aliases and we would have lots of extra cursors in our form's DE...
>>
>>With RowSourceType = 0 - Boom, You can't add NULL in list :-)
>> RowSourceType = 3 [SQL] and
>> RowSourceType = 6 [Fields] doesn't works also.
>
>Does Alias work? I think this is the one most commonly used. I believe it works. But why do we have such inconsistency in array vs. Alias? And I posted another thread few months ago about alias vs. arrays, where alias doesn't add an extra record while array does add it.
>
>Anyway, your tests indicated we're in the serious trouble. I would need to change my combobox class and we may need to change code in couple of places.. :(

No, Alias doesn't works also. But don't take my tests as final solution. Make your own, because here is almost 21st and I am sleepy :-) What I do is in that form I send it before just to cjange RowSourceType and fill the combo with different values based of RowSourceType.