private void danhSáchCácPhươngTiệnToolStripMenuItem_Click(object sender, EventArgs e) { if (nmpt == null || nmpt.IsDisposed) { nmpt = new FrmNguyenMau_PT(); } nmpt.ShowDialog(); }
private void nguyênMẫuToolStripMenuItem_Click(object sender, EventArgs e) { FrmNguyenMau_PT nmpt = new FrmNguyenMau_PT(); nmpt.Show(); }