Simple Multimedia Player Algorithm?

I've just recently started using VB.Net 2010 Express edition and Windows 7 Home Premium x64 and I'm trying to write a simple multimedia player. My algorithm is: Simple mutlimedia player algorithm: 1. Create a form with three listboxes (one for accessible directories, one for accessible files, one for INACCESSIBLE directories and files), a drive combobox (for a list of drives). A textbox for holding the file extension. A 'start search' button to initiate a search for the files. 2. Form load populates the comboBox with a list of all logical drives that are of type fixed and are ready. 3. The user selects a drive to search using the comboxBox. 4. The user enters a file extension in a textbox. 5. The user presses the search button. 6. The computer searches all directories starting at root for any and all files matching the file extension. The allowed read access directories are added to a listbox of directories. The allowed read access filenames (i.e. the full path of each individual file) are added to a listbox of filenames. 7. Once the files listbox is populated, clicking on a file in the listbox passes the full path of the selected file to another form which is opened and shows the ID3 v1 tags of the file in textboxes and also the obligatory open, play, pause, stop and close buttons. Plus an Edit Ok button which gets enabled if the user edits the ID3 v1 tags. 8. The sequence for playing the file is: open, play (then any of pause, play, stop), close - note that close also stops the file first if it is currently playing then closes it. 9. The user closes the playing form and goes back to first form (i.e. the search form). 10. Closing the search form exits the application. Ok I can populate the drives combobox no problem. I can get a list of directories ok I can't (and believe me. I've tried 100's of ways) seem to get a filelist of all the files in all the directories [starting at root] that match the criteria - that's the bit I keep getting stuck on. I keep getting an unauthorized access exception. Trapping that exception doesn't seem to do anything useful as I can't continue the search loop (OR get the filename that is causing the exception and add it to the files listbbox) - and so can't get any filenames. BTW I can open, play, pause, stop and close any given mp3 file (with a correct path) no problem using the Win32 API.

I know I've d/l a couple of file listers but they are/seem highly complicated for what should be a very simple task. In good old DOS, it would take a line or two of using the DIR or Tree commands to find the files so I can't believe that it is so hard to do in VB.Net It seems [to me] that Directory.GetFiles(searchpattern, startdirectory, option searchFolderDepth) doesn't properly work due to the exception which arises from the unathourised exception event (and which it then seems to be impossible of getting the filepath and then continuing the loop by simple exception handler code).