Possibility to drag / drop listitem from outside a datatable to add new column

Hi,

I'm investigating the possibility to add new columns to a datatable by presenting the user a list with available columns that could be added to the table (outside the datatable) and when the user drags one of the listitems over the datatable and drops it, the columns is added to the datatable.

Preferably showing a nice caret at the place where the column will be dropped / added to the table, like for example is done when reordering the columns...

Is something like this possible?
I think I need to make use of some kind of drag event to show the caret and a drop event when the users drops the column to add the column to the table.

thanks in advance,
Richard