ListViewItemStates is diffrent in win7 and xp

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.NET2.0

C#

.NET

WinForms

protected override void OnDrawItem(DrawListViewItemEventArgs e)
{
    base.OnDrawItem(e);
    DrawItemInternal(e);
}

internal void DrawItemInternal(DrawListViewItemEventArgs e)
{
    Rectangle backRect = e.Bounds;
    Graphics g = e.Graphics;
    ListViewItem item = e.Item;
    ListViewItemStates itemState = e.State;

    ImageList imageList = item.ImageList;
    bool bDrawImage = (imageList != null) && (item.ImageIndex != -1 || !string.IsNullOrEmpty(item.ImageKey));
    bool bSelected = (itemState & ListViewItemStates.Selected) != 0;

    if (bDrawImage)
    {
        DrawImage(g, item, bSelected);
    }

    if (bDrawImage == true)
    {
        backRect.X = backRect.X + 20;
        backRect.Width = backRect.Width - 20;

    }

    Rectangle rect = new Rectangle(backRect.X, backRect.Y, backRect.Width - 1, backRect.Height - 1);
    //Console.WriteLine(itemState.ToString());
    if (itemState == (ListViewItemStates.Focused|ListViewItemStates.ShowKeyboardCues| ListViewItemStates.Selected))
    {
        RectangleF rectf = new RectangleF(backRect.X, backRect.Y, backRect.Width - 1, backRect.Height - 0.5f);
        using (SolidBrush blueBrush = new SolidBrush(Color.FromArgb(49, 106, 196)))
        {
            g.FillRectangle(blueBrush, rectf);
        }

        using (Pen pen1 = new Pen(Color.Black))
        {
            pen1.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
            g.DrawRectangle(pen1, rect);
        }
    }

    if (itemState == (ListViewItemStates.Focused | ListViewItemStates.ShowKeyboardCues))
    {
        using (Pen pen1 = new Pen(Color.Black))
        {
            pen1.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
            g.DrawRectangle(pen1, rect);
        }
    }

    Console.WriteLine(itemState.ToString());

}

I custom listview and draw listview item ,there's some questions.
when i choose one item,it will be show blue background,when i leave the mouse,it will be show dot rectangle around this item.

so the itemState below is:
if (itemState == (ListViewItemStates.Focused|ListViewItemStates.ShowKeyboardCues| ListViewItemStates.Selected))

but it's in windows xp environment,if i run my software in windows 7 environment. the itemState below is:
if (itemState == (ListViewItemStates.Focused|ListViewItemStates.Selected))

why the itemState is diffirent？