static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); frmLogin frmL = new frmLogin(); frmUsers frmUsers = new frmUsers(); frmGoods frmGoods = new frmGoods(); Application.Run(frmL); if (frmL.LoginOk == true) { Application.Run(new frmMain()); } if (frmL.LoginYes == true) { Application.Run(new frmUserMain()); } }