C#

<code>
IntPtr hBitmap = CreateCompatibleBitmap(hScreen, 800, 600);
Bitmap bitmap = Bitmap.FromHbitmap(hBitmap);
BitmapData bData = bitmap.LockBits(new Rectangle(0,0,bitmap.Width,bitmap.Height), ImageLockMode.ReadWrite, bitmap.PixelFormat);

[StructLayout(LayoutKind.Sequential)]
public class BITMAPINFOHEADER
{
 public uint biSize; // DWORD
 public long biWidth; // LONG
 public long biHeight; //LONG
 public uint biPlanes; // WORD 
 public uint biBitCount; // WORD
 public uint biCompression; // DWORD
 public uint biSizeImage; // DWORD
 public long biXPelsPerMeter; // LONG
 public long biYPelsPerMeter; // LONG
 public uint biClrUsed; // DWORD
 public uint biClrImportant; // DWORD
 public BITMAPINFOHEADER()
 {
   biSize = Marshal.SizeOf(this);
 }
}
 
[StructLayout(LayoutKind.Sequential)]
public class RGBQUAD 
{
 public byte rgbBlue; 
 public byte rgbGreen; 
 public byte rgbRed; 
 public byte rgbReserved; 
}

[StructLayout(LayoutKind.Sequential)]
public class BITMAPINFO 
{ 
 public BITMAPINFOHEADER bmiHeader; 
 public RGBQUAD [] bmiColors; 
 public BITMAPINFO()
 {
  bmiHeader = new BITMAPINFOHEADER();
  bmiColors = new RGBQUAD[1];
 }
}