Forms :: Identifying Which Control Is Being Pointed At?

I'm familiar with screen.activecontrol but what I am trying to do is to activate an event relevant to the control currently triggering the mousemove event.

In the attached db, if you open the MMHighlight form and move the mouse over the boxes, as they are moved over they go yellow (mousemove event), whilst still hovering, click on a box and the first box displays the first and last boxes selected (mousedown event). release the click to trigger the mouse up event which clears the boxes. Broadly this is working as intended

The problem is the mousemove event which has to be 'personalised' for each control - highlighted in yellow

In the real application there are several hundred controls, so I'm looking for a timesaver - one option being to build a form via vba, but ideally some equivalent to screen.activecontrol and perhaps a third where I can replace [text0] with a generic name - a bit like 'Me' to refer to the form.