C#

using System;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Runtime.InteropServices;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace ResourcesLibrary
{
  [ValueConversion(typeof(Bitmap), typeof(ImageSource))]
  public class BitmapToImageSourceConverter : IValueConverter
  {
    [DllImport("gdi32.dll")]
    private static extern bool DeleteObject(IntPtr hObject);
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
      Bitmap bmp = value as Bitmap;
      if (bmp == null)
        return null;
      using (Stream str = new MemoryStream())
      {
        bmp.Save(str, System.Drawing.Imaging.ImageFormat.Bmp);
        str.Seek(0, SeekOrigin.Begin);
        BitmapDecoder bdc = new BmpBitmapDecoder(str, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
        return bdc.Frames[0];
      }
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
      throw new NotImplementedException();
    }
  }
}

bitmapimage.BeginInit();
bitmapimage.StreamSource = memory;
bitmapimage.CacheOption = BitmapCacheOption.OnLoad;
bitmapimage.EndInit();

window.Content = imageControl;
window.UpdateLayout();
window.ShowDialog();

/// <summary>
/// makes the image uniform between operations, size wise and concerning pixelformat.
/// </summary>
/// <param name="bmp"></param>
private BitmapImage SetModifiedImage(System.Drawing.Bitmap bmp){
    bmp = CreateNonIndexedImage(bmp);
    BitmapImage bmpi = new BitmapImage(); 
    bmpi.BeginInit(); 
    bmpi.StreamSource = new System.IO.MemoryStream((byte[])(new System.Drawing.ImageConverter()).ConvertTo(bmp, typeof(byte[])));
    bmpi.EndInit(); 
        return bmpi;
}

/// <summary>
/// Removes the index color table of the image and makes it uniform.
/// </summary>
/// <param name="bmp"></param>
/// <returns></returns>
private System.Drawing.Bitmap CreateNonIndexedImage(System.Drawing.Bitmap bmp){
    System.Drawing.Bitmap newbmp = new System.Drawing.Bitmap(bmp.Width, bmp.Height, System.Drawing.Imaging.PixelFormat.Format32bppRgb);
    System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(newbmp);
    g.DrawImage(bmp, 0, 0);
    return newbmp;          
}

Hira Khalid wrote:

what will be the variations in gray-scale?

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

Hira Khalid wrote:

The value of R is (237,19,119)

Quote:

The only way I can think of is to create an unmanaged DLL which wraps the other DLL

Quote:

[DllImport("some name.dll", EntryPoint = "_getSc@0",
ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]

string startFolder = @"c:\start dir\";

// Take a snapshot of the file system.
System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(startFolder);

// This method assumes that the application has discovery permissions
// for all folders under the specified path.
IEnumerable<System.IO.FileInfo> fileList = dir.GetFiles("*.*", System.IO.SearchOption.AllDirectories);