// Declare a BarTender application variable
BarTender.Application btApp;
// Create a new instance of BarTender
btApp = new BarTender.Application();
// Set the BarTender application visible
btApp.Visible = true;
// Display the hWnd of BarTender's parent window
MessageBox.Show(btApp.ParentWindow.ToString());
// End the BarTender process
btApp.Quit(BarTender.BtSaveOptions.btDoNotSaveChanges);