Change values of pixels

[gigahertz205]

How do i change the value of pixels? I saw this guide (http://www.codeproject.com/KB/GDI-plus/csharpgraphicfilters11.aspx[^]). Is unsafe code the only way to modify the value of pixels? Since Im only working on grayscale images (8 bit depth), is it possible to "color" in the pixels instead of changing the value numerically?

[Lost User]

Try this : Bitmap bitmap = (Bitmap)Bitmap.FromFile(@"D:\colors.jpg"); bitmap.SetPixel(10, 10, Color.Yellow); pictureBox1.Image = bitmap;