Tom, I am not an expert like many of the participants in the UT, but if I understand your problem correctly, you want to use your combobox value as a view parameter. This would enable you to only show the record in your view that corresponds to the value selected in the combobox value.

I think your problem is when you created your veiw you did not create a parameterized view. If this is the case you would need to modify your view by changing the filter to a "table.value = ?varnum" where table.value is the field in the table that you want to compare to the view parameter. The ? in front of your view parameter will allow you to input the view parameter at runtime i.e. when you select it from the combobox.

I hope this helps.