using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Test
{
  class TBtn : Button
  {
    public TBtn()
    {
      //this.UseVisualStyleBackColor = true;
      this.BackColor = Color.FromArgb(51, 133, 255);
      this.ForeColor = Color.White; 
      this.FlatStyle = FlatStyle.Flat;
      this.FlatAppearance.BorderSize = 0;
      this.FlatAppearance.BorderColor = Color.FromArgb(45, 204, 112);
    }

    protected override void OnMouseDown(MouseEventArgs mevent)
    {
      if (mevent.Button == MouseButtons.Left)
      {
        this.BackColor = Color.Red;
      }
      base.OnMouseDown(mevent);
    }
   
    protected override void OnClick(EventArgs e)
    {
      try
      {
        this.Enabled = false;
        base.OnClick(e);
      }
      finally
      {
        this.Enabled = true; 
      }
    }

    protected override void OnEnabledChanged(EventArgs e)
    {
      base.OnEnabledChanged(e);
      if (Enabled)
      {
        this.BackColor = Color.FromArgb(51, 133, 255);
      }
      else
      {
        this.BackColor = Color.FromArgb(209, 213, 216);
      }
    }
  }
}