private void frmStudent_FormClosing(object sender, FormClosingEventArgs e) { if (exflag) { e.Cancel = false; } else if (MessageBox.Show("This will log you out, do you want to continue?", "Log out", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes) { e.Cancel = true; frmLogin lg = new frmLogin(); lg.Show(); exflag = true; this.Close(); } else { e.Cancel = true; } }