Unhandled exception on Windows98

Tech-Archive recommends: Speed Up your PC by fixing your registry

Why is my application crashing on a windows 98 machine? It runs fine
on the development machine with xp pro.It was developed with VS2005
in
VB. I installed framework 2 and windows installer 2 on the windows 98
machine. The error message I get is "Application generated an
exception that cannot be handled." It then lists the process and
thread IDs.

I installed the app on a windows 98 machine. Some of the functions
work, others do not.
The ones that do not have one thing in common: they make an
asynchronous call to a method in a class library in the same VB
solution.I checked out the methods at msdn which indicates they are
supported on windows 98. I added extra message boxes to see how far
the code gets. The app crashes before reaching the sub that makes
the
async call.


Private Sub btnQuickQuoteOK_Click(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles btnQuickQuoteOK.Click
If Trim(txtQuickQuoteSymbol.Text) = "" Then
MsgBox("A symbol is required.") 'executes if
textbox is
empty
Exit Sub
End If
If InStr(txtQuickQuoteSymbol.Text, ",") > 0 Then
MsgBox("One Symbol only") 'executes if textbox
contains a
comma
Exit Sub
End If
Try
ClearQuickQuote() 'does not execute this
call, but
exception is not handled.
Catch ex As Exception
MsgBox(ex.Message)
End Try
Try
GetQuotes(Split(Trim(txtQuickQuoteSymbol.Text),
",")) 'makes the async call
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub


Private Sub ClearQuickQuote()
txtLast.Text = ""
txtDayHi.Text = ""
txtDayLo.Text = ""
txtOpen.Text = ""
txtClose.Text = ""


End Sub


Private Sub GetQuotes(ByVal Symbols() As String)
' Create an instance of the test class.
Dim ad As New Async()
' Create the delegate.
Try
Dim caller As New AsyncMethodCaller(AddressOf
ad.GetQuotes)
' Initiate the asynchronous call
Dim result As IAsyncResult = caller.BeginInvoke(Symbols,
AddressOf CallbackMethod, _
caller)
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
' Callback method must have the same signature as the
' AsyncCallback delegate.
Sub CallbackMethod(ByVal ar As IAsyncResult)
Dim returnValue As String = ""
' Retrieve the delegate.
Try
Dim caller As AsyncMethodCaller = CType(ar.AsyncState,
AsyncMethodCaller)


' Call EndInvoke to retrieve the results.
returnValue = caller.EndInvoke(ar)
Catch ex As Exception
MsgBox(ex.Message)
End Try


'need to implement a thread-safe way to reference a control
on
the form to avoid a
'cross-thread access error.
SetData(returnValue)


End Sub
Private Sub SetData(ByVal HtmlString As String)
' InvokeRequired required compares the thread ID of the
' calling thread to the thread ID of the creating thread.
' If these threads are different, it returns true.
Try
If Me.WebBrowser1.InvokeRequired Then
Dim d As New SetTextCallback(AddressOf SetData)
Me.Invoke(d, New Object() {HtmlString})
Else
If BusTier.Buslayer.QuickQuote Then
FillQuickQuote(HtmlString)
Else
Me.WebBrowser1.DocumentText = HtmlString
End If
End If
Catch ex As Exception
Exit Sub
End Try


End Sub

.

Relevant Pages

  • Re: How is it possible ...
    ... Dim myExportFile As String = CType, ... Catch ex As Exception ... 'Throw exc ... Private Sub Page_Init(ByVal sender As System.Object, ...
    (microsoft.public.dotnet.languages.vb)
  • Re: Unhandled exception on Windows98
    ... I installed framework 2 and windows installer 2 on the windows 98 ... Private Sub btnQuickQuoteOK_Click(ByVal sender As System.Object, ... exception is not handled. ... Dim caller As New AsyncMethodCaller(AddressOf ...
    (microsoft.public.dotnet.framework)
  • RE: Converting a Datarow() to a Datatable
    ... exception is caused in the following situation: ... I type a char in the derived combobox and the drop down list ... Dim binding As New BindingSource ... Private Sub MultiColumnCombo1_TextChanged(ByVal sender As Object, ...
    (microsoft.public.vsnet.general)
  • Re: How is it possible ...
    ... of inner exception stack trace --- at ... Dim myExportFile As String = CType, ... 'Throw exc ... Private Sub Page_Init(ByVal sender As System.Object, ...
    (microsoft.public.dotnet.languages.vb)
  • Re: GDI+ error when trying to use DoubleBuffer
    ... The Windows Forms Tips and Tricks page has an article on double buffering ... > Dim canvas As Graphics = e.Graphics ... > Private Sub Form1_Resize(ByVal sender As Object, ...
    (microsoft.public.dotnet.framework.drawing)