private void tìmKiếmPhươngTiệnToolStripMenuItem_Click(object sender, EventArgs e) { if (timkiem == null || timkiem.IsDisposed) { timkiem = new FrmTimKiem(); } timkiem.ShowDialog(); }
private void tìmKiếmPhươngTiệnToolStripMenuItem_Click(object sender, EventArgs e) { FrmTimKiem timkiem = new FrmTimKiem(); timkiem.Show(); }