private void registerStudentToolStripMenuItem_Click(object sender, EventArgs e) { if (frmRegisterStudent1 == null) { frmRegisterStudent1 = new frmRegisterStudent(); //frmRegisterStudent1.MdiParent = this; frmRegisterStudent1.FormBorderStyle = FormBorderStyle.None; frmRegisterStudent1.FormClosed += frmRegisterStudent1_FormClosed; this.DisplayButtons(false); frmRegisterStudent1.ShowDialog(); } else { frmRegisterStudent1.Activate(); } }
void frmRegisterStudent1_FormClosed(object sender, FormClosedEventArgs e) { frmRegisterStudent1 = null; this.DisplayButtons(true); }