ThreadExceptionEventArgs Class (System.Threading)

' Creates a class to throw the error.
Public Class ErrorHandler
    Inherits System.Windows.Forms.Form    

    ' Inserts code to create a form with a button.

    ' Programs the button to throw the exception when clicked.
    Private Sub button1_Click(sender As Object, e As System.EventArgs)
        Throw New ArgumentException("The parameter was invalid")
    End Sub

    Public Shared Sub Main()
        ' Creates an instance of the methods that will handle the exception.
        Dim eh As New CustomExceptionHandler()

        ' Adds the event handler to to the event.
        AddHandler Application.ThreadException, AddressOf eh.OnThreadException

        ' Runs the application.
        Application.Run(New ErrorHandler())
    End Sub

End Class

' Creates a class to handle the exception event.
Friend Class CustomExceptionHandler

    'Handles the exception event
    Public Sub OnThreadException(sender As Object, t As ThreadExceptionEventArgs)
        Dim result As DialogResult = DialogResult.Cancel
        Try
            result = Me.ShowThreadExceptionDialog(t.Exception)
        Catch
            Try
                MessageBox.Show("Fatal Error", "Fatal Error", _
                    MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Stop)
            Finally
                Application.Exit()
            End Try
        End Try

        ' Exits the program when the user clicks Abort.
        If result = DialogResult.Abort Then
            Application.Exit()
        End If
    End Sub

    ' Creates the error message and display it.
    Private Function ShowThreadExceptionDialog(e As Exception) As DialogResult
        Dim errorMsg As String = "An error occurred please contact the " & _
            "adminstrator with the following information:" & _
            Microsoft.VisualBasic.ControlChars.Cr & _
            Microsoft.VisualBasic.ControlChars.Cr
        errorMsg &= e.Message & Microsoft.VisualBasic.ControlChars.Cr & _
            Microsoft.VisualBasic.ControlChars.Cr & "Stack Trace:" & _
            Microsoft.VisualBasic.ControlChars.Cr & e.StackTrace
        Return MessageBox.Show(errorMsg, "Application Error", _
            MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Stop)
    End Function
End Class

// Creates a class to throw the error.
 public class ErrorHandler : System.Windows.Forms.Form {

    // Inserts code to create a form with a button.

    // Programs the button to throw the exception when clicked.
    private void button1_Click(object sender, System.EventArgs e) {
       throw new ArgumentException("The parameter was invalid");
    }

    public static void Main(string[] args) {
       // Creates an instance of the methods that will handle the exception.
       CustomExceptionHandler eh = new CustomExceptionHandler();

       // Adds the event handler to to the event.
       Application.ThreadException += new ThreadExceptionEventHandler(eh.OnThreadException);

       // Runs the application.
       Application.Run(new ErrorHandler());
    }
 }

 // Creates a class to handle the exception event.
 internal class CustomExceptionHandler {

    //Handles the exception event
    public void OnThreadException(object sender, ThreadExceptionEventArgs t) 
    {
       DialogResult result = DialogResult.Cancel;
       try {
          result = this.ShowThreadExceptionDialog(t.Exception);
       }
       catch {
          try {
             MessageBox.Show("Fatal Error", "Fatal Error", 
                MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Stop);
          }
          finally {
             Application.Exit();
          }
       }

       // Exits the program when the user clicks Abort.
       if (result == DialogResult.Abort) 
          Application.Exit();
    }

    // Creates the error message and display it.
    private DialogResult ShowThreadExceptionDialog(Exception e) {
       string errorMsg = "An error occurred please contact the adminstrator " +
            "with the following information:\n\n";
       errorMsg = errorMsg + e.Message + "\n\nStack Trace:\n" + e.StackTrace;
       return MessageBox.Show(errorMsg, "Application Error", 
            MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Stop);
    }
 }
 

// Creates a class to handle the exception event.
private ref class CustomExceptionHandler
{
public:

   //Handles the exception event
   void OnThreadException( Object^ /*sender*/, ThreadExceptionEventArgs^ t )
   {
      DialogResult result = DialogResult::Cancel;
      try
      {
         result = this->ShowThreadExceptionDialog( t->Exception );
      }
      catch ( Exception^ ) 
      {
         try
         {
            MessageBox::Show( "Fatal Error", "Fatal Error", MessageBoxButtons::AbortRetryIgnore, MessageBoxIcon::Stop );
         }
         finally
         {
            Application::Exit();
         }

      }


      // Exits the program when the user clicks Abort.
      if ( result == DialogResult::Abort )
            Application::Exit();
   }


private:

   // Creates the error message and display it.
   DialogResult ShowThreadExceptionDialog( Exception^ e )
   {
      String^ errorMsg = "An error occurred please contact the adminstrator with the following information:\n\n";
      errorMsg = String::Concat( errorMsg, e->Message, "\n\nStack Trace:\n", e->StackTrace );
      return MessageBox::Show( errorMsg, "Application Error", MessageBoxButtons::AbortRetryIgnore, MessageBoxIcon::Stop );
   }

};


// Creates a class to throw the error.
public ref class ErrorHandler: public System::Windows::Forms::Form
{
private:

   // Inserts code to create a form with a button.
   // Programs the button to throw the exception when clicked.
   void button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      throw gcnew ArgumentException( "The parameter was invalid" );
   }

};

int main()
{

   // Creates an instance of the methods that will handle the exception.
   CustomExceptionHandler^ eh = gcnew CustomExceptionHandler;

   // Adds the event handler to to the event.
   Application::ThreadException += gcnew ThreadExceptionEventHandler( eh, &CustomExceptionHandler::OnThreadException );

   // Runs the application.
   Application::Run( gcnew ErrorHandler );
}