Opening a XML file with dynamic file name

Hi, I have to use XML files to import data into AX. There is a folder where files will be placed, the problem is that each time a file is available for in the folder it has a different file name. The file name carries the time stamp and other details in this format "Source_Destination_Module_YYYYMMDD_HH24MMSS.xml". So, filenames will always be unique. 
Kindly tell me a solution using which I can import files with unique file names.

Note: This is the method I use for XML files "xmlDoc.load(”c:\temp\AX_PEPS_AP_20150604_01241059.xml”);"