//button event for 'Update' button private void btnUpdate_Click(object sender, EventArgs e) { //if there is no order number entered in field... if (txtUpdate.Text == "") { //print error message lblMessage.Text = "Please enter an existing Service Order number."; } //otherwise else { //if everything is ok... //create instance of form frmEditUpdate Edit = new frmEditUpdate(); //display the form Edit.Show(); } }