Closing a firefox tab with Visual Basic (and JavaScript if needed)

Posted on 2008-06-09
Last Modified: 2013-12-07

Is there a way of closing a tab in Firefox using Visual Basic?  Through VB I can open html files into Firefox, but I'm dealing with hundreds of files and I need to close each file when it's done -- programmatically.  

Can I do this through VB, or maybe a combo of VB and JavaScript?  I have to have control through VB, but if there needs to be a little JS that's okay.

Question by:ugeb
  • 2
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Expert Comment

ID: 21744946
What method do you use to open the html files?
LVL 11

Author Comment

ID: 21745538
I use


Does this matter?


Accepted Solution

NizzeK earned 500 total points
ID: 21751413
If you assign a handle, e.g. like winFF01=System.Diagnostics.Process.Start(filename), you can manage individual windows. I am not sure of the syntax, but this at least works with DDEInitiate("iexplore",webpage)  or Firefox dito. Moslty I use Application.FollowHyperlink "webpage" myself.

PostMessage will soon be available (Firefox 3).
This will enable sending a closure message etc to the specific window.
This is Windows standard. see
See also SendMessage
I have attached some found VB-code as an example.
Unfortunately I haven't found the right code to close a specific tab.

If you assign different title texts in the windows, you can also scan the collection of windows and close the one that matches, using System.Diagnostics.Process.GetProcessesByName("firefox") and
if currentProcess.MainWindowTitle.Equals("titleID") then currentProcess.Kill()
See more:

Private Declare Function EnumWindows Lib _

   "user32" (ByVal lpEnumFunc As Long, lParam _

   As Any) As Long

Private Declare Function _

   GetWindowThreadProcessId Lib "user32" (ByVal _

   hWnd As Long, lpdwProcessId As Long) As Long

Private Declare Function GetWindowLong Lib _

   "user32" Alias "GetWindowLongA" (ByVal hWnd _

   As Long, ByVal nIndex As Long) As Long

Private Declare Function PostMessage Lib _

   "user32" Alias "PostMessageA" (ByVal hWnd As _

   Long, ByVal wMsg As Long, ByVal wParam As _

   Long, lParam As Any) As Long

Private Const GWL_HWNDPARENT = (-8)

Private Const WM_CLOSE = &H10


' Initiate PostCloseMessage callbacks like this:

' Call EnumWindows(AddressOf PostCloseMessage, 

' ByVal ProcessID)


Private Function PostCloseMessage(ByVal hWnd As _

   Long, ByVal lParam As Long) As Long

   Static PID As Long

   ' Check if hWnd belongs to PID: lParam

   Call GetWindowThreadProcessId(hWnd, PID)

   If PID = lParam Then

      ' Belongs to target process, try close 

      ' message if this doesn't have an owner. VB 

      ' apps that display a msgbox from 

      ' QueryUnload will lock a 9x box up hard, 

      ' if we don't do this test!

      If GetWindowLong(hWnd, GWL_HWNDPARENT) _

         = 0 Then

         Call PostMessage(hWnd, WM_CLOSE, _

            0&, ByVal 0&)

      End If

   End If

   ' Return true to continue enumeration.

   PostCloseMessage = True

End Function

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Assisted Solution

NizzeK earned 500 total points
ID: 21751746
Here more that I hope can shed some light on the issue.
(Not VB, however, but can still give some clues)
It handles both Firefox and IE tabs.

Well, DDEinitiate works well with "iexplore", but firefox seems to be more difficult.
btw which version of VB are you using?
Some tips above are for VB.NET

Here is a VB6 page but this will probably kill all tabs in an instance at once.
LVL 11

Author Closing Comment

ID: 31465471
Still have issues, but moved on.  Thanks!

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