private void btnPhieuThu_Click(object sender, EventArgs e) { if (this.ActiveMdiChild != null) { this.ActiveMdiChild.Close(); } ThuChi.frmPhieuThu frm = new ThuChi.frmPhieuThu(); frm.MdiParent = this; frm.Show(); }
private void btnPhieuThu_Click(object sender, EventArgs e) { if (this.ActiveMdiChild != null) this.ActiveMdiChild.Close(); ThuChi.frmPhieuThu frm = new ThuChi.frmPhieuThu(); frm.MdiParent = this; frm.Show(); }