private void button1_Click(object sender, EventArgs e) { if (frmCourse == null) { frmCourse = new frmCourseNew(); frmCourse.MdiParent = this.MdiParent; frmCourse.Dock = DockStyle.Fill; frmCourse.FormClosed += new FormClosedEventHandler(coursenew_FormClosed); frmCourse.Show(); } else { frmCourse.Activate(); } }
private void coursenew_FormClosed(object sender, EventArgs e) { frmCourse = null; }