PrintPreviewControl ppc;
    
        //Here goes MouseDown I just used btn_Click for testing
        private void btnClick_Click(object

private void richTextBox1_Click(object sender, EventArgs e)
         {
             var form2 = new Form2(this);

             form2.textBox1.Text = this.textBox1.Text

             form2.Show();
         }

private void tbRes_Enter(object sender, EventArgs e)
        {
            // Do calculation that you want
            double res = double.Parse(tb1.Text) + double.Parse(tb2.Text);

            // Pass result to textbox
            tbRes.Text = res.ToString();
        }

private void textBox_TextChanged(object sender, TextChangedEventArgs e)
        {
             if (textBox != "")
             {
                 // your code for getting data from database
             }
        }

$query="insert into naipone(Amtoffirstrelease, Amtofsecondrelease, head, subhead," .
 
"Availableamt,sanctionedamt,progressivebal) values" .
 
"('$Amtoffirstrelease','$Amtofsecondrelease','$head','$subhead','$Availableamt','$sanctionedamt','$progressiveba"

private void btnEnter_Click(object sender, EventArgs e)
        {
            //Get ID to string
            string s = textBoxID.Text.ToUpper();

            //Get IDs first letter
            string firstLetter = s.Remove(1, s.Length - 1).ToUpper();

            //Check last letter
            bool lastLetter