TGS3 (#3)

Let's just get this merged instead of having a massive PR

Original PR: tgstation/tgstation#26534

TGControlPanel/Program.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+using TGServiceInterface;
+
+namespace TGControlPanel
+{
+	static class Program
+	{
+		[STAThread]
+		static void Main(string [] args)
+		{
+			try
+			{
+				var res = Server.VerifyConnection();
+				if (res != null)
+				{
+					MessageBox.Show("Unable to connect to service! Error: " + res);
+					return;
+				}
+				Application.EnableVisualStyles();
+				Application.SetCompatibleTextRenderingDefault(false);
+				Application.Run(new Main());
+				return;
+			}
+			catch (Exception e)
+			{
+				ServiceDisconnectException(e);
+			}
+			finally
+			{
+				Properties.Settings.Default.Save();
+			}
+		}
+
+		public static void ServiceDisconnectException(Exception e)
+		{
+			MessageBox.Show("An unhandled exception occurred. This usually means we lost connection to the service. Error" + e.ToString());
+		}
+
+		public static string TextPrompt(string caption, string text)
+		{
+			Form prompt = new Form()
+			{
+				Width = 500,
+				Height = 150,
+				FormBorderStyle = FormBorderStyle.FixedDialog,
+				Text = caption,
+				StartPosition = FormStartPosition.CenterScreen
+			};
+			Label textLabel = new Label() { Left = 50, Top = 20, Text = text, AutoSize = true };
+			TextBox textBox = new TextBox() { Left = 50, Top = 50, Width = 400 };
+			Button confirmation = new Button() { Text = "Ok", Left = 350, Width = 100, Top = 70, DialogResult = DialogResult.OK };
+			confirmation.Click += (sender, e) => { prompt.Close(); };
+			prompt.Controls.Add(textBox);
+			prompt.Controls.Add(confirmation);
+			prompt.Controls.Add(textLabel);
+			prompt.AcceptButton = confirmation;
+
+			return prompt.ShowDialog() == DialogResult.OK ? textBox.Text : null;
+		}
+	}
+}