Checking directory for new files

[Reynard]

How could I do that using API calls? I would just to be notified, when there are any new files in certain directory (and which files)... using API of course. Any ideas?


Thank you very much in advance !

[Matthew Gates]

Try this:

'Author: Aaron Young (with a few added things from Jop)
'Origin: Vb-World.net forums
'Purpose: Monitor a Directory
'Version: VB5+ 
 
 
'You can use the FindFirstChangeNotification() and
'FindNextChangeNotification() API's to monitor a directory 
'for file changes including creation of new files, i.e. 
 
 
Private Declare Function WaitForSingleObject _
Lib "kernel32" (ByVal hHandle As Long, ByVal _
dwMilliseconds As Long) As Long
 
Private Declare Function FindFirstChangeNotification _
Lib "kernel32" Alias "FindFirstChangeNotificationA" _
(ByVal lpPathName As String, ByVal bWatchSubtree As _
Long, ByVal dwNotifyFilter As Long) As Long
 
Private Declare Function FindNextChangeNotification _
Lib "kernel32" (ByVal hChangeHandle As Long) As Long
 
Private Const FILE_NOTIFY_CHANGE_FILE_NAME = &H1
Private Const FILE_NOTIFY_CHANGE_LAST_WRITE As Long = &H10
Private Const FILE_NOTIFY_CHANGE_CREATION As Long = &H40
 
Private Sub WaitForFileActivity(ByVal sDirectory As String)
    Dim lHandle As Long
    Dim lReturn As Long
    
    lHandle = FindFirstChangeNotification(sDirectory, 0&, FILE_NOTIFY_CHANGE_LAST_WRITE) 'if something's written to a file
    'or FindFirstChangeNotification(sDirectory, 0&, FILE_NOTIFY_CHANGE_CREATION) 'if a file is being created
    'or FindFirstChangeNotification(sDirectory, 0&, FILE_NOTIFY_CHANGE_FILE_NAME)
    Do
        lReturn = WaitForSingleObject(lHandle, 1)
        Call FindNextChangeNotification(lHandle)
        DoEvents
    Loop While lReturn <> 0
End Sub
 
 
Private Sub Command1_Click()
    WaitForFileActivity "C:\"
    MsgBox "Change", vbSystemModal
End Sub

[Reynard]

Thanx Matthew, I think that's what I wanted !! I'll put that "waitforactivity" in timer (or is there any other solution...that folder is checked constantly?), I think that should work.

Thanx again !

[Matthew Gates]

No need for a timer. It's already looping, just put that in a Command Button called "Watch" or even in the Form_Load() event.