sorting - VB.Net - List files & subfolders from a specified Directory and save to a text document, and sort results -

i working on project requires me search , list files in folder have multiple sub folders , write text documents.

primarily file extension searching .doc, need list other files found in said directory well.

to make things more difficult want text documents sorted file type , directory. not know how possible is, have search methods online, have of yet found correct syntax.

any appreciated.

these articles you

http://social.msdn.microsoft.com/forums/en-us/21151c3b-809f-4cb9-8a1a-ebb073d9227b/list-directories-in-treeview

http://www.developerfusion.com/code/2084/treeview-filesfolder-lists-recursively/