ComboboxEx dropdown direction

Hi,
How do you change a combobox dropdown direction. I have four combobox components on a form and all but one drop in a downwards direction....the other one drops 'down' in an upward direction to edge of the top of screen and won't scroll past that point. Is there a way of changing this behaviour?
Thanks in advance.
Bill Zwirs
How do you change a combobox dropdown direction. I have four combobox components on a form and all but one drop in a downwards direction....the other one drops 'down' in an upward direction to edge of the top of screen and won't scroll past that point. Is there a way of changing this behaviour?
Thanks in advance.
Bill Zwirs