private void FilterButton_Click(object sender, EventArgs e) { if (filterForm == null) { filterForm = new FilterForm(this); } else { filterForm.BringToFront(); filterForm.FilterForm_Load(sender, e); } this.Enabled = false; filterForm.Show(); //comboBox1.Items.Add("lul"); //comboBox1.Items.Add("kek"); //comboBox1.Items.Add("aru"); }