how to save graphs in scope

[Hymae]

I tried to save the data scope, the variable bitmap, and I'd like to display the data using the ListView and ImageList, but when I run the program nothing is displayed. Is the method I use is correct or it is incorrect, please guidance.
For more details, I show the code that I created:

var
JABitmap : TBitmap;
AItem : TListItem;
begin
JABitmap := TBitmap.Create();
ListView1.Items.BeginUpdate();
SLScope1.CopyToBitmap(JABitmap);
ImageList1.Add( JABitmap, NIL );
AItem := ListView1.Items.Add();
ListView1.Items.EndUpdate();
end;

Thanks