[RESOLVED] [2005] How to get around error 91

[redmo]

Hey folks, I've been working on adding a couple of search engines to my IE clone, but everytime i run the program, i always get this msg

Object reference not set to an instance of an object. Error Number: 91

the documentation on .GetElementById and .InvokeMember is sketchy at best, i've tried msdn, this forum, google, and all the other tricks i know, can anyone help?

Here's my code

Private Sub doSearchQuery()
        Dim google As String = "http://www.google.com/search?hl=en&q=" 'Google's search engine string
        Dim yahoo As String = "http://search.yahoo.com/search;_ylt=A0geuoxASo1FZw4AFj2l87UF?ei=UTF-8&fr=sfp&p=" 'Yahoo's search engine string
        Dim googleId As String = "btnG"
        Dim Click As String = "click"
        'Dim helement As New HtmlElement
 
        Try
 
            If lbSearchSelect = "Google" Then
                wbPKMN.Navigate(google & SearchString) 'Navigate to google
                wbPKMN.Document.GetElementById("btnG").InvokeMember(Click)
 
            Else
                wbPKMN.Navigate(yahoo & SearchString) 'navigate to yahoo
                wbPKMN.Document.GetElementById("yschqcon").InvokeMember(Click)
            End If
        Catch ex As Exception
            nwWriteLogMsg(ex.Message, ".\nwpps2k6err.log", ex.StackTrace, ex.TargetSite.ToString, ex.Source, ex.HelpLink)
            With frmException
                .lblTitle.Text = "UriFormatException"
                .txtDesc.Text = ex.Message & " Error Number: " & Err.Number
                .lblSource.Text = ex.Source
                .lblTargetMethod.Text = ex.TargetSite.ToString
                .ctbSTrace.Text = ex.StackTrace
                .ShowDialog(Me)
            End With
        End Try
 
        LbSearch.Hide()
    End Sub

The funny thing about this is, it works, even though it's throwing that error everytime. Just wonder if there's a way around it

Redmo