David,

>It sound like a bit of a strange UI.
Yeah, I am strange. <g>

>Is the user really expecting that clicking on an item is going to make the list of items themselves change and if so what if the item they just clicked to select is now no longer in the list?
Yes. I guess I might as well fess up now. I wrote this form for my own use to maneuver around my hard drive from the command window without having to type cd \this folder or cd ..\that folder, etc. So I populate the listbox with foldername from the current folder in the left listbox and the current folder's files in the right listbox. The functionality I'm lookingfor is that a single click does a cd on the selected bar and repopulates the listbox to reflect the folder change. The purpose of the dblclick would be to make the change and release the form without have to use a command button or the close box.
And no, I don't like the looks of GETDIR()and its functionality is more limited than my form solution. And other Windows UI elements perform different functions depending on the number of clicks used, eg Explorer.

>You might want to use Click() and Rightclick() instead.
I like to reserve Rightclick() for menus.

Joey...