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   源码介绍

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

namespace 获取坐标
{
    public partial class Form1 : Form
    {
           [DllImport("user32.dll")]//取设备场景
            private static extern IntPtr GetDC(IntPtr hwnd);//返回设备场景句柄
 
            [DllImport("gdi32.dll")]//取指定点颜色
          private static extern int GetPixel(IntPtr hdc, Point p);

        public Form1()
        {
            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            timer1.Start();

        }
 
          private void pictureBox1_MouseDown_1(object sender, MouseEventArgs e)
        {
           
        }

          private void timer1_Tick(object sender, EventArgs e)
          {
              Timer tim = new Timer();
              tim.Interval = 1;
              tim.Tick  = delegate
              {
                  Point p = new Point(MousePosition.X, MousePosition.Y);//取置顶点坐标
                  IntPtr hdc = GetDC(new IntPtr(0));//取到设备场景(0就是全屏的设备场景)
                  string txtStartX = MousePosition.X.ToString();
                  string txtStartY = MousePosition.Y.ToString();
                  toolStripStatusLabel1.Text ="坐标位置：X:" txtStartX   ",Y:"   txtStartY;
                  int c = GetPixel(hdc, p);//取指定点颜色
                  int r = (c & 0xFF);//转换R
                  int g = (c & 0xFF00) / 256;//转换G
                  int b = (c & 0xFF0000) / 65536;//转换B
                  pictureBox1.BackColor = Color.FromArgb(r, g, b);
                  toolStripStatusLabel2.Text = "RGB：R:"   r.ToString()   ",G:"   g.ToString() ",B:"   b.ToString();
              };
              tim.Start();
          }

          private void Form1_FormClosing(object sender, FormClosingEventArgs e)
          {
              DialogResult TS = MessageBox.Show("您确认要确认退出吗？", "系统消息", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
              if (TS == DialogResult.Yes)
              {
                  // e.Cancel = false;
                  // Application.Exit();
                  Application.ExitThread();
              }
              else
              {
                  e.Cancel = true;
              }
          }

          private void Form1_Resize(object sender, EventArgs e)
          {
              if (this.WindowState == FormWindowState.Minimized)
              {
                  this.Hide();
                  this.ShowInTaskbar = false;
                  //this.notifyIcon.Visible = true;
              }  
          }

          private void notifyIcon1_DoubleClick(object sender, EventArgs e)
          {
              if (this.WindowState == FormWindowState.Minimized)
              {
                  this.Show();
                  this.WindowState = FormWindowState.Normal;
                  //notifyIcon.Visible = false;
                  this.ShowInTaskbar = true;
              }  
          }

          private void Form1_SizeChanged(object sender, EventArgs e)
          {
              try
              {
                  //最小化  
                  if (this.WindowState == FormWindowState.Minimized)
                  {
                      //不显示窗体  
                      this.ShowInTaskbar = false;
                      //托盘可见  
                      this.notifyIcon1.Visible = true;

                      //气球提示           
                      this.notifyIcon1.ShowBalloonTip(3, "提示", "系统仍在运行！\n如要打开，请点击图标", ToolTipIcon.Info);

                  }
              }
              catch (Exception ex)
              {

              }  
          }

         


    }
}