C# Pixel Colour Help

[HackerOverload]

Why is nobody posting....='(

[HackerOverload]

Well, i have tried using X/Y coordinates, but i don't really know how to use those either. Preferably pixel detection though.

I'll post my source code here for something that i did do, but its not really that close to what i want...

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

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private Bitmap myBitmap;

        public class Win32APICall
        {
            [DllImport("gdi32.dll", EntryPoint = "DeleteDC")]
            public static extern IntPtr DeleteDC(IntPtr hdc);

            [DllImport("gdi32.dll", EntryPoint = "DeleteObject")]
            public static extern IntPtr DeleteObject(IntPtr hObject);

            [DllImport("gdi32.dll", EntryPoint = "BitBlt")]
            public static extern bool BitBlt(IntPtr hdcDest, int nXDest,
                int nYDest, int nWidth, int nHeight, IntPtr hdcSrc,
                int nXSrc, int nYSrc, int dwRop);

            [DllImport("gdi32.dll", EntryPoint = "CreateCompatibleBitmap")]
            public static extern IntPtr CreateCompatibleBitmap(IntPtr hdc,
                int nWidth, int nHeight);

            [DllImport("gdi32.dll", EntryPoint = "CreateCompatibleDC")]
            public static extern IntPtr CreateCompatibleDC(IntPtr hdc);

            [DllImport("gdi32.dll", EntryPoint = "SelectObject")]
            public static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobjBmp);

            [DllImport("user32.dll", EntryPoint = "GetDesktopWindow")]
            public static extern IntPtr GetDesktopWindow();

            [DllImport("user32.dll", EntryPoint = "GetDC")]
            public static extern IntPtr GetDC(IntPtr hWnd);

            [DllImport("user32.dll", EntryPoint = "GetSystemMetrics")]
            public static extern int GetSystemMetrics(int nIndex);

            [DllImport("user32.dll", EntryPoint = "ReleaseDC")]
            public static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDC);

            public static Bitmap GetDesktop()
            {
                int screenX;
                int screenY;
                IntPtr hBmp;
                IntPtr hdcScreen = GetDC(GetDesktopWindow());
                IntPtr hdcCompatible = CreateCompatibleDC(hdcScreen);

                screenX = GetSystemMetrics(0);
                screenY = GetSystemMetrics(1);
                hBmp = CreateCompatibleBitmap(hdcScreen, screenX, screenY);

                if (hBmp != IntPtr.Zero)
                {
                    IntPtr hOldBmp = (IntPtr)SelectObject(hdcCompatible, hBmp);
                    BitBlt(hdcCompatible, 0, 0, screenX, screenY, hdcScreen, 0, 0, 13369376);

                    SelectObject(hdcCompatible, hOldBmp);
                    DeleteDC(hdcCompatible);
                    ReleaseDC(GetDesktopWindow(), hdcScreen);

                    Bitmap bmp = System.Drawing.Image.FromHbitmap(hBmp);

                    DeleteObject(hBmp);
                    GC.Collect();

                    return bmp;
                }

                return null;
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void label1_MouseDown(object sender, MouseEventArgs e)
        {
            myBitmap = Win32APICall.GetDesktop();
        }

        private void label1_MouseUp(object sender, MouseEventArgs e)
        {
            Color myColor = myBitmap.GetPixel(MousePosition.X, MousePosition.Y);
            label1.BackColor = myColor;
        }
    }
}

And with that, you would just click the label, and hold you mouse, and drag it onto a different color, and the label would grab that color. But...how do i "detect" a color?

[kenobewan]

What have you tried so far? Please provide more info. Thanks.

[HackerOverload]

Okay, well I am trying to detect when a program is done, by detecting the colour change of the pixels.

See, when the program is done, it has gets a big blue button at the bottom to exit it. And i want my C# program to detect when it is done, and exit that program.

I have absolutely no idea on how to do this. I hope you guys have answers =)