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;
}