Cross-thread operation not valid

[jamesd0142]

Hi again,

Im using vb 2005

Im using this code to watch a folder and log any changes etc...

[code=vbnet]
Imports System.IO
Imports System.Diagnost ics


Public Class Form1

Public watchfolder As FileSystemWatch er


Private Sub btn_startwatch_ Click(ByVal sender As System.Object, ByVal e As System.EventArg s) Handles btn_startwatch. Click
watchfolder = New System.IO.FileS ystemWatcher()

'this is the path we want to monitor
watchfolder.Pat h = txt_watchpath.T ext

'Add a list of Filter we want to specify
'make sure you use OR for each Filter as we need to
'all of those

watchfolder.Not ifyFilter = IO.NotifyFilter s.DirectoryName
watchfolder.Not ifyFilter = watchfolder.Not ifyFilter Or _
IO.NotifyFilter s.FileName
watchfolder.Not ifyFilter = watchfolder.Not ifyFilter Or _
IO.NotifyFilter s.Attributes

' add the handler to each event
AddHandler watchfolder.Cha nged, AddressOf logchange
AddHandler watchfolder.Cre ated, AddressOf logchange
AddHandler watchfolder.Del eted, AddressOf logchange

' add the rename handler as the signature is different
AddHandler watchfolder.Ren amed, AddressOf logrename

'Set this property to true to start watching
watchfolder.Ena bleRaisingEvent s = True

btn_startwatch. Enabled = False
btn_stop.Enable d = True

'End of code for btn_start_click

End Sub

Private Sub logchange(ByVal source As Object, ByVal e As _
System.IO.FileS ystemEventArgs)
If e.ChangeType = IO.WatcherChang eTypes.Changed Then
txt_folderactiv ity.Text &= "File " & e.FullPath & _
" has been modified" & vbCrLf
End If
If e.ChangeType = IO.WatcherChang eTypes.Created Then
txt_folderactiv ity.Text &= "File " & e.FullPath & _
" has been created" & vbCrLf
End If
If e.ChangeType = IO.WatcherChang eTypes.Deleted Then
txt_folderactiv ity.Text &= "File " & e.FullPath & _
" has been deleted" & vbCrLf
End If
End Sub
Public Sub logrename(ByVal source As Object, ByVal e As _
System.IO.Renam edEventArgs)
txt_folderactiv ity.Text &= "File" & e.OldName & _
" has been renamed to " & e.Name & vbCrLf
End Sub

Private Sub btn_stop_Click( ByVal sender As System.Object, ByVal e As System.EventArg s) Handles btn_stop.Click
' Stop watching the folder
watchfolder.Ena bleRaisingEvent s = False
btn_startwatch. Enabled = True
btn_stop.Enable d = False

End Sub
End Class

[/code]

I get this error: on line: 47
[code=text]
Cross-thread operation not valid: Control 'txt_folderacti vity' accessed from a thread other than the thread it was created on.
[/code]

Can anyone suggest anything, or tell me what this error means?

James

[jamesd0142]

[code=vbnet]
System.Windows. Forms.Control.C heckForIllegalC rossThreadCalls = false
[/code]

Made the problem go away.

James