场景 效果 实现 关键代码 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.InteropSe
场景
效果
实现
关键代码
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 GetColor{ public partial class FrmGetColor : Form { public FrmGetColor() { InitializeComponent(); } #region 定义快捷键 //如果函数执行成功，返回值不为0。 //如果函数执行失败，返回值为0。要得到扩展错误信息，调用GetLastError。 [DllImport("user32.dll", SetLastError = true)] public static extern bool RegisterHotKey( IntPtr hWnd, //要定义热键的窗口的句柄 int id, //定义热键ID（不能与其它ID重复） KeyModifiers fsModifiers, //标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效 Keys vk //定义热键的内容 ); [DllImport("user32.dll", SetLastError = true)] public static extern bool UnregisterHotKey( IntPtr hWnd, //要取消热键的窗口的句柄 int id //要取消热键的ID ); //定义了辅助键的名称（将数字转变为字符以便于记忆，也可去除此枚举而直接使用数值） [Flags()] public enum KeyModifiers { None = 0, Alt = 1, Ctrl = 2, Shift = 4, WindowsKey = 8 } #endregion [DllImport("gdi32.dll")] static public extern uint GetPixel(IntPtr hDC,int XPos,int YPos); [DllImport("gdi32.dll")] static public extern IntPtr CreateDC(string driverName,string deviceName,string output,IntPtr lpinitData); [DllImport("gdi32.dll")] static public extern bool DeleteDC(IntPtr DC); static public byte GetRValue(uint color) { return (byte)color; } static public byte GetGValue(uint color) { return ((byte)(((short)(color))>>8)); } static public byte GetBValue(uint color) { return ((byte)((color)>>16)); } static public byte GetAValue(uint color) { return ((byte)((color)>>24)); } public Color GetColor(Point screenPoint) { IntPtr displayDC = CreateDC("DISPLAY",null,null,IntPtr.Zero); uint colorref = GetPixel(displayDC,screenPoint.X,screenPoint.Y); DeleteDC(displayDC); byte Red = GetRValue(colorref); byte Green = GetGValue(colorref); byte Blue = GetBValue(colorref); return Color.FromArgb(Red, Green, Blue); } private void FrmGetColor_Load(object sender, EventArgs e) { this.TopMost = true; } private void checkBox1_CheckedChanged(object sender, EventArgs e) { if (checkBox1.Checked == true) { this.TopMost = true; } else { this.TopMost = false; } } private void timer1_Tick(object sender, EventArgs e) { txtPoint.Text=Control.MousePosition.X.ToString()+","+Control.MousePosition.Y.ToString(); Point pt = new Point(Control.MousePosition.X, Control.MousePosition.Y); Color cl = GetColor(pt); panel1.BackColor = cl; txtRGB.Text = cl.R + "," + cl.G + "," + cl.B; txtColor.Text = ColorTranslator.ToHtml(cl).ToString(); RegisterHotKey(Handle, 81, KeyModifiers.Ctrl, Keys.F); } private void button1_Click(object sender, EventArgs e) { Application.Exit(); } protected override void WndProc(ref Message m) { const int WM_HOTKEY = 0x0312; //按快捷键 switch (m.Msg) { case WM_HOTKEY: switch (m.WParam.ToInt32()) { case 81: //按下的是CTRL+F Clipboard.SetText(txtColor.Text.Trim()); break; } break; } base.WndProc(ref m); } private void FrmGetColor_Leave(object sender, EventArgs e) { } private void FrmGetColor_FormClosed(object sender, FormClosedEventArgs e) { //注销Id号为81的热键设定 UnregisterHotKey(Handle, 81); } }}程序与代码下载
公众号“霸道的程序猿”发送“颜色拾取器”