不能输入文字和英文的文本框可用于一下计算钱等用处

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 WindowsFormsApp3
{
    public partial class CustomControl1 : Control
    {
        public CustomControl1（）
        {
            InitializeComponent（）;
        }

        protected override void OnPaint（PaintEventArgs pe）
        {
            base.OnPaint（pe）;
        }
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-10-12 09:58  WindowsFormsApp3\
     目录           0  2019-10-12 09:29  WindowsFormsApp3\.vs\
     目录           0  2019-10-12 09:29  WindowsFormsApp3\.vs\WindowsFormsApp3\
     目录           0  2019-10-12 09:29  WindowsFormsApp3\.vs\WindowsFormsApp3\v16\
     文件       41984  2019-10-12 11:00  WindowsFormsApp3\.vs\WindowsFormsApp3\v16\.suo
     目录           0  2019-10-12 09:29  WindowsFormsApp3\.vs\WindowsFormsApp3\v16\Server\
     目录           0  2019-10-12 09:29  WindowsFormsApp3\.vs\WindowsFormsApp3\v16\Server\sqlite3\
     目录           0  2019-10-12 11:00  WindowsFormsApp3\WindowsFormsApp3\
     文件        1687  2019-10-12 10:04  WindowsFormsApp3\WindowsFormsApp3.sln
     文件         187  2019-10-12 09:29  WindowsFormsApp3\WindowsFormsApp3\App.config
     目录           0  2019-10-12 09:42  WindowsFormsApp3\WindowsFormsApp3\bin\
     目录           0  2019-10-12 10:22  WindowsFormsApp3\WindowsFormsApp3\bin\Debug\
     文件        9216  2019-10-12 11:00  WindowsFormsApp3\WindowsFormsApp3\bin\Debug\WindowsFormsApp3.exe
     文件         187  2019-10-12 09:29  WindowsFormsApp3\WindowsFormsApp3\bin\Debug\WindowsFormsApp3.exe.config
     文件       32256  2019-10-12 11:00  WindowsFormsApp3\WindowsFormsApp3\bin\Debug\WindowsFormsApp3.pdb
     目录           0  2019-10-12 09:42  WindowsFormsApp3\WindowsFormsApp3\bin\Release\
     文件         533  2019-10-12 09:56  WindowsFormsApp3\WindowsFormsApp3\CustomControl1.cs
     文件        1057  2019-10-12 09:56  WindowsFormsApp3\WindowsFormsApp3\CustomControl1.Designer.cs
     文件        5817  2019-10-12 09:57  WindowsFormsApp3\WindowsFormsApp3\CustomControl1.resx
     文件        1388  2019-10-12 11:00  WindowsFormsApp3\WindowsFormsApp3\Form1.cs
     文件        2033  2019-10-12 10:59  WindowsFormsApp3\WindowsFormsApp3\Form1.Designer.cs
     文件        5817  2019-10-12 10:59  WindowsFormsApp3\WindowsFormsApp3\Form1.resx
     目录           0  2019-10-12 09:29  WindowsFormsApp3\WindowsFormsApp3\obj\
     目录           0  2019-10-12 10:59  WindowsFormsApp3\WindowsFormsApp3\obj\Debug\
     文件        5314  2019-10-12 10:45  WindowsFormsApp3\WindowsFormsApp3\obj\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        7256  2019-10-12 10:45  WindowsFormsApp3\WindowsFormsApp3\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     目录           0  2019-10-12 09:29  WindowsFormsApp3\WindowsFormsApp3\obj\Debug\TempPE\
     文件          42  2019-10-12 10:22  WindowsFormsApp3\WindowsFormsApp3\obj\Debug\WindowsFormsApp3.csproj.CoreCompileInputs.cache
     文件        1323  2019-10-12 10:46  WindowsFormsApp3\WindowsFormsApp3\obj\Debug\WindowsFormsApp3.csproj.FileListAbsolute.txt
     文件        1079  2019-10-12 10:59  WindowsFormsApp3\WindowsFormsApp3\obj\Debug\WindowsFormsApp3.csproj.GenerateResource.cache
     文件         424  2019-10-12 10:59  WindowsFormsApp3\WindowsFormsApp3\obj\Debug\WindowsFormsApp3.csprojAssemblyReference.cache
............此处省略35个文件信息