【C#】[取色]取屏幕指定点颜色(Api)

效果图：   

这是核心代码：

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 取指定点颜色

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }



        [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);





        private void timer1_Tick(object sender, EventArgs e)

        {

            Point p = new Point(MousePosition.X, MousePosition.Y);//取置顶点坐标

            textBox_p.Text = p.X + "," + p.Y;//把坐标显示到窗口上

            IntPtr hdc = GetDC(new IntPtr(0));//取到设备场景(0就是全屏的设备场景)

            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

            textBox_10jz.Text = c.ToString();//输出10进制颜色

            textBox_16jz.Text = r.ToString("x").PadLeft(2, '0') + g.ToString("x").PadLeft(2, '0') + b.ToString("x").PadLeft(2, '0');//输出16进制颜色

            textBox_RGB.Text = r.ToString() + ',' + g.ToString() + ',' + b.ToString();//输出RGB

            pictureBox_color.BackColor = Color.FromArgb(r,g,b);//设置颜色框

        }





    }

}

源码下载：

http://download.csdn.net/source/3001806

http://files.cnblogs.com/isaced/%5b%e5%8f%96%e8%89%b2%5d%e5%8f%96%e6%8c%87%e5%ae%9a%e7%82%b9%e9%a2%9c%e8%89%b2(Api).zip