Drag and Drop Selection

I am using RAD Studio XE - C++.  I am using version of AdvStringGrid.

I am enabling drag and drop from one cell to another.  I followed the directions in the Users Guide and am able to successfully drag and drop from one cell to another.  My problem is that I have to first double click on the cell to be dragged, and then click again to start the drag operation.  

What do I need to do to be able to start the drag on the very first mouse down?

Thank you.
M Weingarden

Did you compare with sample app 28 that demonstrates this?
Normally, you should not have to double click first. A single click to select a cell followed by a click to perform the drag start should be sufficient.