Help using _WinAPI_GetOpenFileName()

I'm using _WinAPI_GetOpenFileName with $OFN_ALLOWMULTISELECT to first display a list of files in a GUICtrlCreateEdit box, then write the results to a text file.  The issue that I'm having is that the output looks like this:

C:\test1
file1.txt
file2.txt
file3.txt
C:\test2
filea.txt
fileb.txt
 

I would like it to be more like this:

C:\test1\file1.txt

C:\test1\file2.txt

C:\test1\file3.txt

C:\test2\filea.txt

C:\test2\fileb.txt

I've already reviewed _WinAPI_GetOpenFileName and $tagOPENFILENAME and couldn't find what I was looking for (unless I missed something).  Any recommendations on how to go about this?  Thanks!