Microsoft KB Archive/279535

Knowledge Base

How to suppress run-time script errors as a WebBrowser control host in a Visual Basic application

Article ID: 279535

Article Last Modified on 5/11/2006

---

APPLIES TO

• Microsoft Internet Explorer 5.0
• Microsoft Internet Explorer 5.01
• Microsoft Internet Explorer (Programming) 5.01 SP1
• Microsoft Internet Explorer 5.5

---

This article was previously published under Q279535

SUMMARY

To suppress the default Internet Explorer error message for the window onerror event, you can set the returnValue property of the event object to True.

MORE INFORMATION

To set the returnValue property to True, perform the following steps:

1. Create a new Visual Basic standard EXE project. Form1 is created by default.
2. Add a WebBrowser control to Form1.
3. Add a Project Reference to the Microsoft HTML Object Library (Mshtml.tlb).

4. In the declarations section of Form1, add the following code:

   Dim WithEvents objDoc As MSHTML.HTMLDocument
   Dim WithEvents objWind As MSHTML.HTMLWindow2
   Dim objEvent As CEventObj
                       

5. In the WebBrowser1_NavigateComplete event, add the following code:

   Private Sub WebBrowser1_NavigateComplete()
   
       Set objDoc = WebBrowser1.Document
       Set objWind = objDoc.parentWindow
       
   End Sub

6. Add an event handler for the window onerror event as follows:

   Private Sub objWind_onerror(ByVal description As String, ByVal URL As String, ByVal line As Long)
      
      
       Set objEvent = objWind.event
       objEvent.returnValue = True
       MsgBox (description)
    
    
   End Sub

Note This method will not trap compilation errors. In addition, this method only suppresses the error message when you turn off the Scripting Debugger in Internet Explorer. By design, if the Scripting Debugger is turned on, the error is not suppressed. To turn off the Scripting Debugger in Internet Explorer, on the Tools menu, click Internet Options. On the Advanced tab, select the Disable script debugging check box, and then click OK.

REFERENCES

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

261003 How to handle script errors as a WebBrowser control host

183616 How to trap JScript errors on a Web page

For more information on how to handle and avoid Web page errors, see the following article on the Microsoft Developer Network (MSDN):

http://msdn.microsoft.com/workshop/Author/script/WebErrors.asp

For more information regarding the onerror event, see the following MSDN Web site:

http://msdn.microsoft.com/workshop/author/dhtml/reference/events/onerror.asp

For more information about developing Web-based solutions for Microsoft Internet Explorer, visit the following Microsoft Web sites:

http://msdn.microsoft.com/ie/

http://support.microsoft.com/iep

Additional query words: onerror

Keywords: kbhowto kbwebbrowser KB279535

---

Send feedback to Microsoft

© Microsoft Corporation. All rights reserved.