You can use TextWidth method of the form class to calculate width of text string in pixels. I use it to found the longest string in column and set the column width to that value. Don't forget to set form's Font and FontSize properties to the same values as they are set for your listbox.
/A new technology turns into completely outdated stuff before you have a time to read "Getting Started..." section.
/If there are some "system programmers" then others are unsystematic.