private void tsbtnLapphieu_Click(object sender, EventArgs e) { frmHoaDon frm = new frmHoaDon(); tsbtnXoa.Enabled = false; frm.ShowDialog(); LoadData(); }
private void lậpHóaĐơnToolStripMenuItem_Click(object sender, EventArgs e) { frmHoaDon frm = new frmHoaDon(); this.Hide(); frm.ShowDialog(); this.Show(); }