// 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 file name of the active document
MessageBox.Show(btApp.ActiveFormat.FileName);
// End the BarTender process
btApp.Quit(BarTender.BtSaveOptions.btDoNotSaveChanges);