I fear my initial post was misleading.

I have a Windows application.

I have a numerical array which is displayed in a datagrid by way of a
datatable and a dataview.

I want my user to be able to select a sub-block of the grid's cells for
subsequent copy/paste/delete operations.

How does one do this?

Mark,

In my opinion is what you ask impossible with a datagrid.
A datagrid exist from selectable rows, which has references to data items in
tables.

Therefore first a question, how are you able to select columns/rows using a
datagrid. After that there is maybe an answer how to drag them to another
control, which also is able to copy them to a collection of columns/rows (I
do not know one in windowforms, it should be a tablecontrol or something).

Cor

> I fear my initial post was misleading.
>
> I have a Windows application.
>
> I have a numerical array which is displayed in a datagrid by way of a
> datatable and a dataview.
>
> I want my user to be able to select a sub-block of the grid's cells for
> subsequent copy/paste/delete operations.
>
> How does one do this?