Simply add a parameter to your existing injection function that accepts the file location of the current .dll. Then loop through the items in the listbox, passing them as the parameter to the injection function as you call it.
I'm going to go ahead and assume you're using the standard injection method everyone uses. So change the first line of the sub to this:
Code:Private Sub Inject(ByVal dllPath As String)
Then on the pszLibFileRemote or whatever the hell it's called line (the one where you're assigning it's value), change it to this
pszLibFileRemote = dllPath
now, to inject all the listbox items (assuming they contain the full path)
Code:For each item As String in ListBox1.Items Inject(item) Next
Hope that helps.