removing and replacing items in multi column listbox.

Hello.

Ive been having lots of trouble programing a multi column listbox to play ball. On the form there is 1 tree view and two listbox's.
the object is to double click a list 1 item and have that go into the list 2

Connected to the listbox2_dblClick.. Takes the selected list item and adds to columns 1 intergra value.
This places a annoyance to me where listbox 2 is not fully populated (you will see ive fully populated the list during my own testing) and a item is selcted if double click on a blank part of the listbox it will increase the int value of the selected item.

I though of populating the list with blanks (used "." as visual) so a cheek could be made on the double click item and if blank do nothing.

Ive tryed looping the list loading into an array... Though i got close be .removeitem(0) if "." thoguh that failed once i loaded the tail end of the list back up with "." (this number will decrese on each unique list item being added, Not to disurb the scroll part repmaturly)

A Code adventure that is a little trival and not 100% nessary, though even with sore eyes and head to match im not giving up just yet.

The file probley explains it better than my senceless rants.

cheers