I want to enumerate all files and folders in a directory， and i use some functions in <Find.h >, but in FindData struct, i can't distinguish file or folder.
Because it is a cross platform application, so i can't use Win32 API, and how to distinguish file or folder in Noesis API

Directories are not supported in that function because Noesis does not need them. I recommend implementing your own Find function with your specific requirements. You could use our code as a starting point.