procedure TForm1.ListBox1DrawItem(Control: TWinControl; Index: Integer; Rect: TRect; State: TOwnerDrawState);
begin    //字体用原来默认的颜色
 if Odd(index) then   //当items的index为奇数时的颜色
 begin
  listbox1.Canvas.Brush.Color:=clwindow;
  ListBox1.Canvas.TextRect(Rect,rect.Left,Rect.Top,ListBox1.Items[index]);
 end
 else     //当items的index为偶数时的颜色
 begin
  listbox1.Canvas.Brush.Color:=clinactivecaptiontext;
  ListBox1.Canvas.TextRect(Rect,rect.Left,Rect.Top,ListBox1.Items[index]);
 end;
 if  odSelected  in  state  then    //当选定时的颜色
 begin
  listbox1.Canvas.Brush.Color:=clhighlight;
  ListBox1.Canvas.TextRect(Rect,rect.Left,Rect.Top,ListBox1.Items[index]);
 end;
end;