b1 := Image1.Picture.Bitmap;
for y := 0 to b1.Height - 1 do
begin
c1 := b1.Scanline[y];
s:='';
for x := 0 to (b1.Width - 1)*3 do
if (x mod 3) = 2 then
s:= s+ '<span style="color: rgb('+ inttostr(c1[x])+','+inttostr(c1[x])+','+inttostr(c1[x])+');">M</span>';
list.Add(s+'<BR>');
end;

[C#]
private void PopulateListView()
{
ListView1.Width = 270;
ListView1.Location = new System.Drawing.Point(10, 10);

// Declare and construct the ColumnHeader objects.
ColumnHeader header1, header2;
header1 = new ColumnHeader();
header2 = new ColumnHeader();

// Set the text, alignment and width for each column header.
header1.Text = "File name";
header1.TextAlign = HorizontalAlignment.Left;
header1.Width = 70;

header2.TextAlign = HorizontalAlignment.Left;
header2.Text = "Location";
header2.Width = 200;

// Add the headers to the ListView control.
ListView1.Columns.Add(header1);
ListView1.Columns.Add(header2);

// Populate the ListView.Items property.
// Set the directory to the sample picture directory.
System.IO.DirectoryInfo dirInfo =
new System.IO.DirectoryInfo(
"C:\\Documents and Settings\\All Users" +
"\\Documents\\My Pictures\\Sample Pictures");


// Get the .jpg files from the directory
System.IO.FileInfo[] files = dirInfo.GetFiles("*.jpg");

// Add each file name and full name including path
// to the ListView.
if (files != null)
{
foreach ( System.IO.FileInfo file in files )
{
ListViewItem item = new ListViewItem(file.Name);
item.SubItems.Add(file.FullName);
ListView1.Items.Add(item);
}
}
}

private void InitializePictureBox()
{
PictureBox1 = new PictureBox();

// Set the location and size of the PictureBox control.
this.PictureBox1.Location = new System.Drawing.Point(70, 120);
this.PictureBox1.Size = new System.Drawing.Size(140, 140);
this.PictureBox1.TabStop = false;

// Set the SizeMode property to the StretchImage value. This
// will shrink or enlarge the image as needed to fit into
// the PictureBox.
this.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;

// Set the border style to a three-dimensional border.
this.PictureBox1.BorderStyle = BorderStyle.Fixed3D;

// Add the PictureBox to the form.
this.Controls.Add(this.PictureBox1);

}


private void ListView1_MouseDown(object sender, MouseEventArgs e)
{

ListViewItem selection = ListView1.GetItemAt(e.X, e.Y);

// If the user selects an item in the ListView, display
// the image in the PictureBox.
if (selection != null)
{
PictureBox1.Image = System.Drawing.Image.FromFile(
selection.SubItems[1].Text);
}
}

private void button5_Click(object sender, System.EventArgs e)
{
//openFileDialog1.ShowDialog();
Bitmap res=new Bitmap (pictureBox1.Image );
Bitmap res2=new Bitmap(res) ;
Color[,] renkler=new Color [res.Size.Height , res.Size.Width ];
int i,j;
for ( i=0;i<res.Size.Height-1 ;i++)
for ( j=0;j<res.Size.Width -1 ; j++)
{
renkler[i,j]=res.GetPixel (j,i);
}
for (i=res.Size.Height-1 ;i>0;i--)
for (j=res.Size.Width -1 ;j>0;j--)
{
res2.SetPixel (res.Size.Width-j,res.Size.Height-i,renkler[i,j]);

}
pictureBox2.Image=res2;


}

HWND hwndkaynak=(HWND)pictureBox1->Handle.ToInt32();
HDC hdckaynak;

hdckaynak=GetWindowDC(hwndkaynak);
HDC hMemDc=CreateCompatibleDC(hdckaynak);
RECT r;
GetWindowRect(hwndkaynak,&r);
SIZE size;
size.cx=r.right-r.left;
size.cy=r.bottom-r.top;
HBITMAP hBitmap=CreateCompatibleBitmap(hdckaynak,size.cx,size.cy);
if(hBitmap)
{
HBITMAP hOld=(HBITMAP)SelectObject(hMemDc,hBitmap);
for (int i=0;i<size.cx;i++)
for(int j=0;j<size.cy;j++)
{
BitBlt(hMemDc,size.cx-i,size.cy-j,1,1,hdckaynak,i,j,SRCCOPY);
}
SelectObject(hMemDc,hOld);
DeleteDC (hMemDc);
ReleaseDC(NULL,hdckaynak);
pictureBox2->Image=Image::FromHbitmap(hBitmap);
DeleteObject(hBitmap);
}