private void buttonItem3_Click(object sender, EventArgs e) { if (ChucVufrm == null || ChucVufrm.IsDisposed) { ChucVufrm = new frmChucVu(); ChucVufrm.MdiParent = this; ChucVufrm.Show(); } else { ChucVufrm.Activate(); } }
private void btnChucVu_Click(object sender, EventArgs e) { frmChucVu CV = new frmChucVu(); CV.ShowDialog(); }