怎么获得form窗体中某个像素的颜色值？

Question

代码怎么写的啊

Answer 1

  [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr GetDC(IntPtr hWnd);        [DllImport("gdi32.dll")]
        public static extern uint GetPixel(IntPtr hDC, int XPos, int YPos);        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            IntPtr _DC = GetDC(this.Handle);
            
            uint _ColorLong = GetPixel(_DC, e.X, e.Y);
            //uint v_Red, v_Green, v_Blue;
            //v_Red = v_Color & 0xFF;
            //v_Green = (v_Color & 0xFF00) / 256;
            //v_Blue = (v_Color & 0xFF0000) / 65536;
            Color _Color = Color.FromArgb((int)_ColorLong & 0xFF, (int)(_ColorLong & 0xFF00) / 256, (int)(_ColorLong & 0xFF0000) / 65536);            button1.ForeColor = _Color;
            ReleaseDC(this.Handle, _DC);        }

Answer 2

C#不用头文件
需要的是using namespace ...

Answer 3

恩，查到了
using System.Runtime.InteropServices;
谢谢各位