可否推荐几款2000左右的4k显示器？

       https://wenxue.ca/wp-content/uploads/2020/08/laomaiREC_Portable.zip     

       https://wenxue.ca/wp-content/uploads/2020/08/VoiceREC01__portable_x86.zip     

       using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; using System.IO; using System.Media; //using System.Windows.Media;   namespace easyREC  {      public partial class Form1 : Form     {         private System.Media.SoundPlayer myPlayer = new SoundPlayer();         [DllImport("winmm.dll", EntryPoint = "mciSendString", CharSet = CharSet.Auto)]         public static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, IntPtr HwndCallback);         string ps_SoundLocation = Directory.GetCurrentDirectory();        [DllImport("winmm.dll", EntryPoint = "PlaySound")]        public static extern int PlaySound(string lpxzName, int hModul, int dwFlags);           public Form1()         {             InitializeComponent();         }          private void buttonREC_Click(object sender, EventArgs e)         {             int lu_errcode;             int lu_cch = 0;             richTextBox1.Text = "";              mciSendString("stop WaveDump" + "", "", 0, IntPtr.Zero);             string lsb_ret = "";                          richTextBox1.Text += "
" + lsb_ret + "
";             timer1.Enabled = true;             buttonPLAY.Visible = false;             buttonSTOP.Visible = true;             buttonSTOP.Enabled = true;             string ls_mciRetV = "";              Global.gdt_begin = DateTime.Now;              try             {                   mciSendString("open new type waveaudio alias WaveDump", ls_mciRetV, 0, IntPtr.Zero);                 // 切换不同的采样参数                      mciSendString("set WaveDump time format ms bitspersample 16 channels 1 samplespersec 44100 bytespersec 88200 alignment 2", ls_mciRetV, 0, IntPtr.Zero); //Working Great                 lu_errcode = mciSendString("record WaveDump", ls_mciRetV, 0, IntPtr.Zero);                 this.Text = "Recording..." + ls_mciRetV;                  if (lu_errcode != 0)                 {                     richTextBox1.Text += "
" + lsb_ret + "
";                 }                 else                 {                     richTextBox1.Text += "
" + lu_errcode.ToString() + " error(s). 
";                 }              }             catch (Exception ex)             {                 MessageBox.Show(ex.Message, "WTF, not my fault, Man...");             }             buttonREC.BackColor = System.Drawing.Color.Pink; // "red";             buttonSTOP.BackColor = SystemColors.Control;          }          private void buttonSTOP_Click(object sender, EventArgs e)         {              buttonREC.BackColor = SystemColors.Control;             buttonREC.Enabled = false;             int lu_errcode;             int lu_cch = 0;             string lsb_ret = "";              try             {                 lu_errcode = mciSendString("pause WaveDump", "", 0, IntPtr.Zero);                 this.Text = "Stopped.";                 richTextBox1.Text += "
" + lsb_ret + "
";              }             catch (Exception ex)             {                 MessageBox.Show(ex.Message, "BLAHHH...");             }              Global.gdt_end = DateTime.Now;             buttonSTOP.BackColor = System.Drawing.Color.Gray; // "red";             string timestamp = "_" + Global.gdt_begin.ToString().Replace(" ", "_").Replace(":", "t").Replace("/", "-") + "_till_" + Global.gdt_end.ToString().Replace(":", "t").Replace("/", "-").Replace(" ", "_") + "_.wav";                 ps_SoundLocation = Directory.GetCurrentDirectory() + "\" + timestamp;                 mciSendString("save WaveDump " + ps_SoundLocation, "", 0, IntPtr.Zero);                 mciSendString("close WaveDump", "", 0, IntPtr.Zero);              richTextBox1.Text += "
"+ ps_SoundLocation + " <-- Paste the PATH by CTRL-V.";             this.Text = "Saved to " + ps_SoundLocation + " <-- The Path ";                          Global.gdt_begin = DateTime.Now;  // next episode              buttonREC.Enabled = true;             buttonSTOP.Enabled = false;             buttonPLAY.Visible = true;             buttonPLAY.Enabled = true;             Clipboard.SetText(ps_SoundLocation);         }          private void buttonPLAY_Click(object sender, EventArgs e)         {             int lu_errcode = 1;             string  lsb_ret = "";             int lu_cch = 0;             try             {                 mciSendString("stop" + "", "", 0, IntPtr.Zero);             }             catch (Exception ex)             {                 MessageBox.Show(ex.Message, "Trying to play, but ....");             }              if (ps_SoundLocation == Directory.GetCurrentDirectory() | ps_SoundLocation == "" | ps_SoundLocation.Length > 120)             {                 OpenFileDialog open = new OpenFileDialog();                 open.Filter = "Wave|*.wav";                 if (open.ShowDialog() == DialogResult.OK) { ps_SoundLocation = open.FileName; }                 PlaySound(ps_SoundLocation, 0, 0x1);             }             else             {                 try                 {                     buttonPLAY.BackColor = System.Drawing.Color.Green;                     lu_errcode = mciSendString("play " + ps_SoundLocation, "", 0, IntPtr.Zero);                     this.Text =  "Playing: " + ps_SoundLocation ;                     if (lu_errcode != 0)                     {                         richTextBox1.Text += "
" + lsb_ret + " " + lu_cch.ToString() + " char(s).  " + "
";                     }                     else                     {                         richTextBox1.Text += "
 
 " + lu_errcode.ToString() + " error(s)." + " " + lu_cch.ToString() + " char(s).  " + " 
";                         richTextBox1.Text += "
" + "Playing: " + ps_SoundLocation;                     }                  }                 catch (Exception ex)                 {                     MessageBox.Show(ex.Message, "Error !!! ....");                 }              }              buttonPLAY.BackColor = SystemColors.Control;             buttonREC.BackColor = SystemColors.Control;             buttonSTOP.BackColor = SystemColors.Control;         }          private void timer1_Tick(object sender, EventArgs e)         {             this.Text = "Message Left in the textbox! " + " Time is: " + DateTime.Now.ToString() + "." + DateTime.Now.Millisecond.ToString();         }          private void Form1_Load(object sender, EventArgs e)         {             buttonPLAY.Visible = false;             buttonSTOP.Visible = false;          }          private void Form1_FormClosed(object sender, FormClosedEventArgs e)         {             timer1.Enabled = false;         }          public static class Global     {          public static string gs_clipurl = null;         public static string gs_clippath = "c:\"; //  C:*******inDebug          ////DateTime.Now         public static DateTime gdt_begin = DateTime.Now;         public static DateTime gdt_end = DateTime.Now;     }              }     }  }