vba 用户窗体 文本框 怎么样让你做的输入框输入的字符顶着文本框左边界

tem.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication5
{
public partial class Form1 : Form
{
string s;

public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
s = textBox1.Text;
string b = s.ToUpper();
textBox1.Text = b;
}

private void button2_Click(object sender, EventArgs e)
{
s = textBox1.Text;
string b = s.ToLower();
textBox1.Text = b;
}

private void button3_Click(object sender, EventArgs e)
{
this.textBox1.Text = s;
}
}
}

me.文本框名字.LeftMargin =0
也就是文本左边距设置一下就好了