private void button1_Click(object sender, EventArgs e) { if (textBox1.Text == "") { MessageBox.Show("PLEASE SELECT ANY FILE"); } else { if (this.button1.Text == "PLAY") { this.button1.BackColor = System.Drawing.Color.IndianRed; this.button1.Text = "PAUSE"; if (flag == 0) { form2.excelprocess(); } else { form2.starttimer(); flag = 0; } } else { this.button1.BackColor = System.Drawing.Color.DarkOliveGreen; this.button1.Text = "PLAY"; flag = 1; form2.tymstopper(); } } }