Digital text to speech alarm clock

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace _2TryAlarmClock
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
DateTime alarmtime;
private void timer1_Tick(object sender, EventArgs e)
{
label3.Text = DateTime.Now.ToLongTimeString();
if(label3.Text.Equals(alarmtime.ToString("HH:mm:ss")))
{
MessageBox.Show("Correct");
}
else
{
MessageBox.Show("Un-Correct");
}

}
private void Form1_Load(object sender, EventArgs e)
{

}

private void alarmon()
{
DateTime dt = DateTime.Now;
int hour = Convert.ToInt32(comboBox1.Text);
int min = Convert.ToInt32(comboBox2.Text);
int sec = Convert.ToInt32(comboBox3.Text);
alarmtime = new DateTime(dt.Year, dt.Month, dt.Day,hour, min, sec);
timer1.Enabled = true;
}
private void cloudStartMenuButton1_Click(object sender, EventArgs e)
{
alarmon();
}

}
}