// Declare a BarTender application variable 
                
                BarTender.Application btApp; 
                
                // Declare a BarTender document variable 
                
                BarTender.Format btFormat; 
                
                // Create a new instance of BarTender 
                
                btApp = new BarTender.Application();
                
                // Set the BarTender application visible
                
                btApp.Visible = true;
                
                // Open a BarTender document
                
                btFormat = btApp.Formats.Open("c:\\Format1.btw", false, "");
                
                // Display the named data source value
                
                MessageBox.Show(btFormat.GetNamedSubStringValue("ProductName"));
                
                // End the BarTender process 
                
                btApp.Quit(BarTender.BtSaveOptions.btDoNotSaveChanges);