EsPy/EsPy/Dialogs/InputDialog.cs

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

namespace EsPy.Dialogs
{
    public partial class InputDialog : Form
    {
        public InputDialog()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            this.button1.Enabled = this.textBox1.Text.Length > 0;
        }
    }
}