Riferimenti ...

Directory Management Functions
http://msdn.microsoft.com/en-us/library/aa363950(VS.85).aspx

in particolare

FindFirstFile
http://msdn.microsoft.com/en-us/library/aa364418(VS.85).aspx

e le altre ...

L'esempio

Listing the Files in a Directory
http://msdn.microsoft.com/en-us/library/aa365200(VS.85).aspx