private void barButtonItem4_ItemClick(object sender, ItemClickEventArgs e)
{
//btnMonHoc
frmMonHoc mh = new frmMonHoc();
mh.MdiParent = this;
mh.Show();
}
private void btnMonHoc_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
Form frm = this.CheckExists(typeof(frmMonHoc));
if (frm != null)
{
frm.Activate();
}
else
{
frmMonHoc f = new frmMonHoc();
f.MdiParent = this;
f.Show();
}
}