ProgressForm.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 FF13Randomizer
{
    public partial class ProgressForm : Form
    {
        Action<BackgroundWorker> action;
        public ProgressForm(string text, Action<BackgroundWorker> action)
        {
            InitializeComponent();
            this.Activate();
            this.ControlBox = false;
            this.Text = "";
            this.action = action;

            label1.Text = text;

            progressBar1.Maximum = 100;
            progressBar1.Step = 1;
            progressBar1.Value = 0;
            backgroundWorker1.RunWorkerAsync();
        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            action.Invoke(backgroundWorker1);
        }

        private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            progressBar1.Value = e.ProgressPercentage;
        }

        private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            if (e.Error != null)
                throw new Exception("Randomizer Error", e.Error);
            this.Close();
        }
    }
}