I wish to be able to drag and drop text from a single cell
in one FlexGrid to a signle cell in another FlexGrid. One
solution is to use a floating textbox: copy the contents of
the source cell into the textbox, dragdrop the textbox to
the destination cell and copy textbox contents into the
destination cell. This is rather convoluted and results in
the need to double click on the source cell whereas a
single click and drag is desirable.

Question: How can a DragDrop be applied to a single cell in
a FlexGrid?