<%
Dim myFSO
'this line creates an instance of the File Scripting Object named myFSO
SET myFSO = Server.CreateObject("Scripting.FileSystemObject")
'error handling here to make sure that things go smoothly
'if the folder does not exist 
If NOT myFSO.FolderExists("C:\Inetpub\wwwroot\myNewFolder") Then
'then we create it on this drive in the path we specify
myFSO.CreateFolder("C:\Inetpub\wwwroot\myNewFolder")
Else
'otherwise we tell the client it does so they don't get a nasty error
Response.Write "THIS FOLDER ALREADY EXISTS"
End If
'this line destroys the instance of the File Scripting Object named myFSO
SET myFSO = NOTHING
%>

Now you can do this with ease. Just make sure you have write permissions to the server in the directory you want to create the folder in.

To create a text file in the same way look at this tutorial.
To write to the file look at this tutorial.
To delete a file look at this tutorial.
To delete a folder look at this tutorial.