private void btnSubmit_Click(object sender, EventArgs e)
        {
            txtFirstName.Text = HKStringUtilities.NoPunctuationString(txtFirstName.Text);
            txtLastName.Text  = HKStringUtilities.NoPunctuationString(txtLastName.Text);

            txtFullName.Text = HKStringUtilities.FullName(txtFirstName.Text, txtLastName.Text);

            if (HKNumericUtilities.IsInteger(txtInteger.Text))
            {
                lblErrInteger.Text = "";
            }
            else
            {
                lblErrInteger.Text = "Not allow ',/./-'";
                txtInteger.Focus();
            }

            if (HKNumericUtilities.IsNumeric(txtNumric.Text))
            {
                lblErrNumeric.Text = "";
            }
            else
            {
                lblErrNumeric.Text = "Invalid number(not allow ',').";
                txtNumric.Focus();
            }

            if (HKValidations.validatePhoneNumber(txtPhoneNumber.Text))
            {
                txtPhoneNumber.Text    = HKStringUtilities.setPhoneMask(txtPhoneNumber.Text);
                lblErrPhoneNumber.Text = "";
            }
            else
            {
                lblErrPhoneNumber.Text = "Invalid Phone Number(10 digits).";
                txtPhoneNumber.Focus();
            }

            if (HKValidations.valideUSZipCode(txtUSZip.Text))
            {
                txtUSZip.Text    = HKStringUtilities.setUSZipCodeFormat(txtUSZip.Text);
                lblErrUSZip.Text = "";
            }
            else
            {
                lblErrUSZip.Text = "Invalid zip code(len 5 or 9).";
                txtUSZip.Focus();
            }

            if (HKValidations.validatePostalCode(txtPostalCode.Text))
            {
                txtPostalCode.Text    = HKStringUtilities.setPostalCode(txtPostalCode.Text);
                lblErrPostalCode.Text = "";
            }

            else
            {
                lblErrPostalCode.Text = "Invalid postal code.";
                txtPostalCode.Focus();
            }

            if (txtPunctuation.Text == "")
            {
                lblErrPunc.Text = "";
            }
            else
            {
                txtPunctuation.Text = HKNumericUtilities.NoPunctuationString(txtPunctuation.Text);
                lblErrPunc.Text     = "No punctuation, changed the value.";
            }

            if (txtExtract.Text == "")
            {
                lblErrExtract.Text = "";
            }
            else
            {
                txtExtract.Text    = HKStringUtilities.getOnlyDigitals(txtExtract.Text);
                lblErrExtract.Text = "Extracted only digital numbers.";
            }


            if (txtCapital.Text == "")
            {
                lblErrCap.Text = "";
            }
            else
            {
                txtCapital.Text = HKStringUtilities.setCapitalizedString(txtCapital.Text);
                lblErrCap.Text  = "Changed that the first letter is capitalized letter.";
            }
        }
 private void txtOnlyNumber_KeyPress(object sender, KeyPressEventArgs e)
 {
     HKNumericUtilities.KeyPressEventHandler(e);
 }