private void buttonSortear_Click(object sender, EventArgs e) { //using (FormNumSorteio formNumSorteio = new FormNumSorteio(infoSort, colItem, colBilhete)) //{ // formNumSorteio.MdiParent = this.MdiParent; // formNumSorteio.Show(); //} this.Visible = false; FormNumSorteio formNumSorteio = new FormNumSorteio(infoSort, colItem, colBilhete); formNumSorteio.MdiParent = this.MdiParent; formNumSorteio.Show(); this.Close(); }