[sde]

ok, i needed a break from work. this is done in c#, but maybe you can follow the logic and re-write it.

this is just a windows application with 1 text box and 1 button.

keep in mind that arrays in c# are 0 based. if i remember correctly, VB arrays start on 1.

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

namespace Test
{
	public class Form1 : System.Windows.Forms.Form
	{
		// declare your arraylist and current value here
		private ArrayList x;
		private int currentValue = 0;

		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.TextBox textBox1;
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			InitializeComponent();

			// setup your arraylist
			x = new ArrayList();
			x.Add("A");
			x.Add("B");
			x.Add("C");
			x.Add("D");
			x.Add("E");
			x.Add("F");
			x.Add("G");
			x.Add("H");
			x.Add("I");
			x.Add("J");
			x.Add("K");
			x.Add("L");
			x.Add("M");
			x.Add("N");
			x.Add("O");
			x.Add("P");
			x.Add("Q");
			x.Add("R");
			x.Add("S");
			x.Add("T");
			x.Add("U");
			x.Add("V");
			x.Add("W");
			x.Add("X");
			x.Add("Y");
			x.Add("Z");

			// print the current value to the text box
			this.textBox1.Text = x[currentValue].ToString();
		}

		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.button1 = new System.Windows.Forms.Button();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(32, 32);
			this.button1.Name = "button1";
			this.button1.TabIndex = 0;
			this.button1.Text = "button1";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(120, 32);
			this.textBox1.Name = "textBox1";
			this.textBox1.TabIndex = 1;
			this.textBox1.Text = "";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(292, 266);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.button1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			// increment the current value by 1
			currentValue++;

			// if the current value is higher than the amount of
			// items in your array, set it to 0
			if(currentValue >= x.Count)
			{
				currentValue = 0;
			}

			// print the current value to the text box
			this.textBox1.Text = x[currentValue].ToString();
		}
	}
}

hope that helps.