Public Sub Printing(printer As String)
    Try
        streamToPrint = New StreamReader(filePath)
        Try
            printFont = New Font("Arial", 10)
            Dim pd As New PrintDocument()
            AddHandler pd.PrintPage, AddressOf pd_PrintPage
            ' Specify the printer to use.
            pd.PrinterSettings.PrinterName = printer

            If pd.PrinterSettings.IsValid then
               pd.Print()
            Else
               MessageBox.Show("Printer is invalid.")
            End If
        Finally
            streamToPrint.Close()
        End Try
    Catch ex As Exception
        MessageBox.Show(ex.Message)
    End Try
End Sub

public void Printing(string printer) {
  try {
    streamToPrint = new StreamReader (filePath);
    try {
      printFont = new Font("Arial", 10);
      PrintDocument pd = new PrintDocument(); 
      pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);
      // Specify the printer to use.
      pd.PrinterSettings.PrinterName = printer;

      if (pd.PrinterSettings.IsValid) {
         pd.Print();
      } 
      else {    
         MessageBox.Show("Printer is invalid.");
      }
    } 
    finally {
      streamToPrint.Close();
    }
  } 
  catch(Exception ex) {
    MessageBox.Show(ex.Message);
  }
}

public:
   void Printing( String^ printer )
   {
      try
      {
         streamToPrint = gcnew StreamReader( filePath );
         try
         {
            printFont = gcnew System::Drawing::Font( "Arial",10 );
            PrintDocument^ pd = gcnew PrintDocument;
            pd->PrintPage += gcnew PrintPageEventHandler(
               this, &Form1::pd_PrintPage );
            // Specify the printer to use.
            pd->PrinterSettings->PrinterName = printer;
            if ( pd->PrinterSettings->IsValid )
            {
               pd->Print();
            }
            else
            {
               MessageBox::Show( "Printer is invalid." );
            }
         }
         finally
         {
            streamToPrint->Close();
         }
      }
      catch ( Exception^ ex ) 
      {
         MessageBox::Show( ex->Message );
      }
   }