private void tsbtnDangKy_Click(object sender, EventArgs e)
{
if (!IsShow("frmDangKy"))
{
frmDangKy dangky = new frmDangKy();
dangky.StartPosition = FormStartPosition.CenterScreen;
dangky.MdiParent = this;
dangky.Show();
}
else
{
foreach (Form frmDangKy in this.MdiChildren)
{
if (frmDangKy.Name == "frmDangKy")
{
frmDangKy.Activate();
break;
}
}
}
}
private void mnuDangKy_Click(object sender, EventArgs e)
{
frmDangKy dangky = new frmDangKy();
dangky.ShowDialog();
}