Is you question how to cut the columns off at a specific width?
It *should* work if you set your columncount and then set columnwidths. Can you post an example of how you set these properties?

>Problem:
>As the product names are very big. the combo column width is exceeding the width of the combo and going out of the form.
>but sometime do show it within the form.
>
>I have tried to play around with columnwidth property of combo but no success.