'Enabled' should work. What's the problem you have with it?
Do you want to prevent users from picking up other values?

>This is the "answer" but I didn't mention this is a ReadOnly (didn't think this would have anything to do with this). The Style is what I needed, but now it can not be control as ReadOnly? I tried Enabled feature but didn't work either? What's up with that?
>
>Chuck
>
>>>I have a Combobox with the following:
>>>
>>>ControlSource: auth.authtype
>>>RowSource: authtype.authtype
>>>RowSourceType: 6 - Fields
>
>>Firstly, make sure that combo.style=2 (drop-down list)