PaxScripter demo application written in C# which illustrates debug capabilities.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using PaxScript.Net;

namespace DebugApp
{
	public class WinForm : System.Windows.Forms.Form
	{
		private System.ComponentModel.IContainer components;
		private System.Windows.Forms.RichTextBox rtbScript;
		private System.Windows.Forms.Button btnReset;
		private System.Windows.Forms.Button btnRun;
		private System.Windows.Forms.Button btnTraceInto;
		private System.Windows.Forms.Button btnStepOver;
		private System.Windows.Forms.Button btnAddBreakpoint;
		private System.Windows.Forms.Button btnRemoveBreakpoint;
		private PaxScript.Net.PaxScripter paxScripter1;
		private System.Windows.Forms.RichTextBox rtbState;

		public WinForm()
		{
			InitializeComponent();
			ShowInfo(paxScripter1, paxScripter1.State);

		}

		protected override void Dispose (bool disposing)
		{
			if (disposing)
			{
				if (components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose(disposing);
		}

		#region Windows Form Designer generated code
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			this.rtbScript = new System.Windows.Forms.RichTextBox();
			this.btnReset = new System.Windows.Forms.Button();
			this.btnRun = new System.Windows.Forms.Button();
			this.btnTraceInto = new System.Windows.Forms.Button();
			this.btnStepOver = new System.Windows.Forms.Button();
			this.btnAddBreakpoint = new System.Windows.Forms.Button();
			this.btnRemoveBreakpoint = new System.Windows.Forms.Button();
			this.paxScripter1 = new PaxScript.Net.PaxScripter(this.components);
			this.rtbState = new System.Windows.Forms.RichTextBox();
			this.SuspendLayout();
			//
			// rtbScript
			//
			this.rtbScript.Location = new System.Drawing.Point(160, 8);
			this.rtbScript.Name = "rtbScript";
			this.rtbScript.Size = new System.Drawing.Size(280, 200);
			this.rtbScript.TabIndex = 0;
			this.rtbScript.Text = @"using System;class TestFactorial{    public static long Factorial (long number)    {        if (number == 0)            return 1;        else            return (number * Factorial (number - 1));    }    public static void Main()    {        Console.WriteLine(""3 factorial is {0}"", Factorial(3));    }}";
			//
			// btnReset
			//
			this.btnReset.Location = new System.Drawing.Point(24, 24);
			this.btnReset.Name = "btnReset";
			this.btnReset.Size = new System.Drawing.Size(112, 23);
			this.btnReset.TabIndex = 1;
			this.btnReset.Text = "Reset";
			this.btnReset.Click += new System.EventHandler(this.btnReset_Click);
			//
			// btnRun
			//
			this.btnRun.Location = new System.Drawing.Point(24, 56);
			this.btnRun.Name = "btnRun";
			this.btnRun.Size = new System.Drawing.Size(112, 23);
			this.btnRun.TabIndex = 2;
			this.btnRun.Text = "Run";
			this.btnRun.Click += new System.EventHandler(this.btnRun_Click);
			//
			// btnTraceInto
			//
			this.btnTraceInto.Location = new System.Drawing.Point(24, 88);
			this.btnTraceInto.Name = "btnTraceInto";
			this.btnTraceInto.Size = new System.Drawing.Size(112, 23);
			this.btnTraceInto.TabIndex = 3;
			this.btnTraceInto.Text = "Trace Into";
			this.btnTraceInto.Click += new System.EventHandler(this.btnTraceInto_Click);
			//
			// btnStepOver
			//
			this.btnStepOver.Location = new System.Drawing.Point(24, 120);
			this.btnStepOver.Name = "btnStepOver";
			this.btnStepOver.Size = new System.Drawing.Size(112, 23);
			this.btnStepOver.TabIndex = 4;
			this.btnStepOver.Text = "Step Over";
			this.btnStepOver.Click += new System.EventHandler(this.btnStepOver_Click);
			//
			// btnAddBreakpoint
			//
			this.btnAddBreakpoint.Location = new System.Drawing.Point(24, 152);
			this.btnAddBreakpoint.Name = "btnAddBreakpoint";
			this.btnAddBreakpoint.Size = new System.Drawing.Size(112, 23);
			this.btnAddBreakpoint.TabIndex = 5;
			this.btnAddBreakpoint.Text = "Add Breakpoint";
			this.btnAddBreakpoint.Click += new System.EventHandler(this.btnAddBreakpoint_Click);
			//
			// btnRemoveBreakpoint
			//
			this.btnRemoveBreakpoint.Location = new System.Drawing.Point(24, 184);
			this.btnRemoveBreakpoint.Name = "btnRemoveBreakpoint";
			this.btnRemoveBreakpoint.Size = new System.Drawing.Size(112, 23);
			this.btnRemoveBreakpoint.TabIndex = 6;
			this.btnRemoveBreakpoint.Text = "Remove Breakpoint";
			this.btnRemoveBreakpoint.Click += new System.EventHandler(this.btnRemoveBreakpoint_Click);
			//
			// paxScripter1
			//
			this.paxScripter1.OnChangeState += new PaxScript.Net.ChangeStateHandler(this.paxScripter1_OnChangeState);
			//
			// rtbState
			//
			this.rtbState.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
						| System.Windows.Forms.AnchorStyles.Left)
						| System.Windows.Forms.AnchorStyles.Right)));
			this.rtbState.Location = new System.Drawing.Point(8, 216);
			this.rtbState.Name = "rtbState";
			this.rtbState.Size = new System.Drawing.Size(432, 96);
			this.rtbState.TabIndex = 9;
			this.rtbState.Text = "";
			//
			// WinForm
			//
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(448, 326);
			this.Controls.Add(this.rtbState);
			this.Controls.Add(this.btnRemoveBreakpoint);
			this.Controls.Add(this.btnAddBreakpoint);
			this.Controls.Add(this.btnStepOver);
			this.Controls.Add(this.btnTraceInto);
			this.Controls.Add(this.btnRun);
			this.Controls.Add(this.btnReset);
			this.Controls.Add(this.rtbScript);
			this.Name = "WinForm";
			this.Text = "WinForm";
			this.ResumeLayout(false);
		}
		#endregion

		[STAThread]
		static void Main()
		{
			Application.Run(new WinForm());
		}

		private void btnReset_Click(object sender, System.EventArgs e)
		{
			paxScripter1.Reset();
		}

		private void btnRun_Click(object sender, System.EventArgs e)
		{
			paxScripter1.Run(RunMode.Run);
		}

		private void btnTraceInto_Click(object sender, System.EventArgs e)
		{
			paxScripter1.Run(RunMode.TraceInto);
		}

		private void btnStepOver_Click(object sender, System.EventArgs e)
		{
			paxScripter1.Run(RunMode.StepOver);
		}

		private void btnAddBreakpoint_Click(object sender, System.EventArgs e)
		{
			paxScripter1.AddBreakpoint("1", 5);
			ShowInfo(paxScripter1, paxScripter1.State);
		}

		private void btnRemoveBreakpoint_Click(object sender, System.EventArgs e)
		{
			paxScripter1.RemoveAllBreakpoints();
			ShowInfo(paxScripter1, paxScripter1.State);
		}

		private void ShowInfo(PaxScript.Net.PaxScripter sender, ScripterState new_state)
		{
			rtbState.Text = "State: " + new_state.ToString();
			rtbState.Text += "\nModule: " + sender.CurrentModule;
			rtbState.Text += "\nLine " + sender.CurrentLineNumber.ToString() +
					" : " + sender.CurrentLine;

			object v = null;
			if (new_state == ScripterState.Paused)
			{
				v = sender.Eval("number");
				sender.DiscardError();
			}

			if (v == null)
				rtbState.Text += "\nnumber = null";
			else
				rtbState.Text += "\nnumber = " + v.ToString();

			rtbState.Text += "\nCall stack:";
			foreach (CallStackRec csr in sender.Call_Stack)
			{
				rtbState.Text += "\n" + csr.CallView + " at line " + csr.LineNumber;
			}

			rtbState.Text += "\nBreakpoints:";
			foreach (Breakpoint bp in sender.Breakpoint_List)
			{
				rtbState.Text += "\nBreakpoint at line " + bp.LineNumber +
					", Activated = " + bp.Activated;
			}
		}

		private void paxScripter1_OnChangeState(PaxScript.Net.PaxScripter sender, PaxScript.Net.ChangeStateEventArgs e)
		{
			if (!sender.HasErrors)
				ShowInfo(sender, e.NewState);

			if (e.NewState == ScripterState.Error)
			{
				MessageBox.Show("Error: " + sender.Error_List[0].Message);
			}
			else if (e.OldState == ScripterState.Init)
			{
				sender.AddModule("1");
				sender.AddCode("1", rtbScript.Text);
			}
		}
	}
}