private void btnTaiKhoan_Click(object sender, EventArgs e)
{
this.Hide();
frmTaiKhoan frm = new frmTaiKhoan();
frm.ShowDialog();
this.Dispose();
}
private void btnTaiKhoan_Click(object sender, EventArgs e)
{
if (TK == null || TK.IsDisposed)
{
TK = new frmTaiKhoan();
TK.MdiParent = this;
TK.Show();
}
else
{
TK.Activate();
}
}