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.

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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.HTMLDocumentDim WithEvents objWind As MSHTML.HTMLWindow2Dim 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