Make A Listbox Resizeable ?

Hi all,

I would like to suggest many many choices to a user which has to select in his update form. To do this, I use a listBox, but it’s not very smart when there is a huge quantity of choices. So I was wondering if there was a mean to make a listBox resizeable by user (like textArea). If not I thought about a mean to open a dialog box with a fixed big listbox size which could be reach clicking on button display instead of listbox itself.

did anybody face this problem ?