C# 自定义软键盘（源码）

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

namespace KeyboardCtrl_V3
{
    public partial class KeyboardCtrl : UserControl
    {
        //===提前从硬盘中读入图片放入内存中，这样不用每次击键都读硬盘了===//
      
        #region
        /*
        Bitmap keyA;
        Bitmap keyA_1;
        Bitmap keyB;
        Bitmap keyB_1;
        Bitmap keyC;
        Bitmap keyC_1;
        Bitmap keyD;
        Bitmap keyD_1;
        Bitmap keyE;
        Bitmap keyE_1;
        Bitmap keyF;
        Bitmap keyF_1;
        Bitmap keyG;
        Bitmap keyG_1;
        Bitmap keyH;
        Bitmap keyH_1;
        Bitmap keyI;
        Bitmap keyI_1

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件      36352  2010-07-21 14:34  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\KeyboardCtrl_V3.dll

     文件       1701  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key（-1.gif

     文件       2074  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key（.gif

     文件       2083  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key）-1.gif

     文件       2041  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key）.gif

     文件        646  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key0-1.gif

     文件       1074  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key0.gif

     文件        578  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key1-1.gif

     文件       1005  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key1.gif

     文件        610  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key2-1.gif

     文件       1042  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key2.gif

     文件        637  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key3-1.gif

     文件       1070  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key3.gif

     文件        614  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key4-1.gif

     文件       1039  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key4.gif

     文件        632  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key5-1.gif

     文件       1184  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key5.gif

     文件        662  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key6-1.gif

     文件       1205  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key6.gif

     文件        585  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key7-1.gif

     文件       1025  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key7.gif

     文件        659  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key8-1.gif

     文件       1205  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key8.gif

     文件        646  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key9-1.gif

     文件       1194  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\key9.gif

     文件        640  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\keyA-1.gif

     文件       1065  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\keyA.gif

     文件       1271  2010-07-20 13:59  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\keyAdd-1.GIF

     文件       1711  2010-07-20 13:56  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\keyAdd.GIF

     文件        635  2009-09-08 10:51  KeyboardCtrl_V4.2_四行键\KeyboardCtrl_V3\bin\Release\keyboardResource\keyB-1.gif

............此处省略106个文件信息